| Abies balsamea (L.) Mill. | 925 images |
| Abies lasiocarpa (Hook.) Nutt. | 160 images |
| Abronia latifolia Eschsch. | 184 images |
| Abronia umbellata Lam. | 150 images |
| Abutilon theophrasti Medik. | 2856 images |
| Acalypha rhomboidea Raf. | 3 images |
| Acanthospermum hispidum DC. | 107 images |
| Acer campestre L. | 18018 images |
| Acer circinatum Pursh | 365 images |
| Acer ginnala Maxim. | 136 images |
| Acer glabrum Torr. | 130 images |
| Acer macrophyllum Pursh | 1060 images |
| Acer negundo L. | 15571 images |
| Acer nigrum Michx. f. | 4 images |
| Acer palmatum Thunb. | 11503 images |
| Acer pensylvanicum L. | 775 images |
| Acer platanoides L. | 15764 images |
| Acer pseudoplatanus L. | 20650 images |
| Acer rubrum L. | 5774 images |
| Acer saccharinum L. | 7427 images |
| Acer saccharum Marshall | 1405 images |
| Acer spicatum Lam. | 397 images |
| Achillea alpina L. | 17 images |
| Achillea distans Waldst. & Kit. ex Willd. | 2099 images |
| Achillea filipendulina Lam. | 5315 images |
| Achillea millefolium L. | 24995 images |
| Achillea pannonica Scheele | 19 images |
| Achillea ptarmica L. | 3176 images |
| Achlys triphylla (Sm.) DC. | 2 images |
| Acinos arvensis (Lam.) Dandy | 29 images |
| Aconitum columbianum Nutt. | 169 images |
| Aconitum lycoctonum L. | 3096 images |
| Aconitum napellus L. | 6532 images |
| Aconitum variegatum L. | 715 images |
| Acorus calamus L. | 610 images |
| Actaea elata (Nutt.) Prantl | 22 images |
| Actaea pachypoda Elliott | 782 images |
| Actaea racemosa L. | 578 images |
| Actaea rubra (Aiton) Willd. | 692 images |
| Adenocaulon bicolor Hook. | 130 images |
| Adiantum capillus-veneris L. | 3019 images |
| Adiantum pedatum L. | 543 images |
| Adonis annua L. | 786 images |
| Adoxa moschatellina L. | 740 images |
| Aegopodium podagraria L. | 11056 images |
| Aesculus glabra Willd. | 827 images |
| Aesculus hippocastanum L. | 15828 images |
| Aesculus pavia L. | 1364 images |
| Aethusa cynapium L. | 1752 images |
| Agalinis aspera (Douglas ex Benth.) Britton | 1 images |
| Agalinis maritima (Raf.) Raf. | 6 images |
| Agalinis purpurea (L.) Pennell | 164 images |
| Agalinis tenuifolia (Vahl) Raf. | 97 images |
| Agastache foeniculum (Pursh) Kuntze | 1772 images |
| Agastache nepetoides (L.) Kuntze | 63 images |
| Agastache scrophulariifolia (Willd.) Kuntze | 19 images |
| Agastache urticifolia (Benth.) Kuntze | 99 images |
| Ageratina altissima (L.) R.M. King & H. Rob. | 5 images |
| Agoseris aurantiaca (Hook.) Greene | 46 images |
| Agoseris glauca (Pursh) Raf. | 33 images |
| Agoseris grandiflora (Nutt.) Greene | 52 images |
| Agoseris heterophylla (Nutt.) Greene | 45 images |
| Agrimonia gryposepala Wallr. | 302 images |
| Agrimonia pubescens Wallr. | 20 images |
| Agrimonia striata Michx. | 18 images |
| Agropyron cristatum (L.) Gaertn. | 108 images |
| Agrostemma githago L. | 3705 images |
| Agrostis canina L. | 49 images |
| Agrostis capillaris L. | 1512 images |
| Agrostis exarata Trin. | 11 images |
| Agrostis gigantea Roth | 133 images |
| Agrostis humilis Vasey | 1 images |
| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | 4 images |
| Agrostis mertensii Trin. | 10 images |
| Agrostis microphylla Steud. | 2 images |
| Agrostis pallens Trin. | 4 images |
| Agrostis perennans (Walter) Tuck. | 4 images |
| Agrostis scabra Willd. | 2 images |
| Agrostis stolonifera L. | 358 images |
| Agrostis variabilis Rydb. | 1 images |
| Ailanthus altissima (Mill.) Swingle | 11415 images |
| Aira caryophyllea L. | 400 images |
| Aira praecox L. | 92 images |
| Ajuga genevensis L. | 3401 images |
| Ajuga reptans L. | 20485 images |
| Alcea rosea L. | 14382 images |
| Alchemilla alpina L. | 1548 images |
| Alchemilla filicaulis Buser | 50 images |
| Alchemilla monticola Opiz | 606 images |
| Alchemilla subcrenata Buser | 61 images |
| Aletris farinosa L. | 19 images |
| Alisma gramineum Lej. | 20 images |
| Alisma subcordatum Raf. | 25 images |
| Alisma triviale Pursh | 35 images |
| Alliaria petiolata (M. Bieb.) Cavara & Grande | 6 images |
| Allium acuminatum Hook. | 55 images |
| Allium canadense L. | 300 images |
| Allium cernuum Roth | 232 images |
| Allium crenulatum Wiegand | 20 images |
| Allium fistulosum L. | 618 images |
| Allium oleraceum L. | 634 images |
| Allium sativum L. | 1174 images |
| Allium schoenoprasum L. | 4147 images |
| Allium tricoccum Aiton | 373 images |
| Allium vineale L. | 3178 images |
| Alnus glutinosa (L.) Gaertn. | 14733 images |
| Alnus incana (L.) Moench | 2585 images |
| Alnus rubra Bong. | 45 images |
| Alnus serrulata (Aiton) Willd. | 124 images |
| Alnus viridis (Chaix) DC. | 3 images |
| Alopecurus aequalis Sobol. | 117 images |
| Alopecurus arundinaceus Poir. | 35 images |
| Alopecurus carolinianus Walter | 3 images |
| Alopecurus geniculatus L. | 107 images |
| Alopecurus magellanicus Lam. | 12 images |
| Alopecurus myosuroides Huds. | 475 images |
| Alopecurus pratensis L. | 2509 images |
| Althaea hirsuta L. | 92 images |
| Althaea officinalis L. | 3209 images |
| Alyssum alyssoides (L.) L. | 944 images |
| Alyssum desertorum Stapf | 16 images |
| Alyssum murale Waldst. & Kit. | 90 images |
| Amaranthus albus L. | 487 images |
| Amaranthus blitum L. | 2171 images |
| Amaranthus californicus (Moq.) S. Watson | 1 images |
| Amaranthus cruentus L. | 1033 images |
| Amaranthus hybridus L. | 1404 images |
| Amaranthus retroflexus L. | 8247 images |
| Amaranthus spinosus L. | 1257 images |
| Ambrosia acanthicarpa Hook. | 62 images |
| Ambrosia artemisiifolia L. | 4702 images |
| Ambrosia psilostachya DC. | 358 images |
| Ambrosia trifida L. | 947 images |
| Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. | 1 images |
| Amelanchier canadensis (L.) Medik. | 2259 images |
| Amelanchier laevis Wiegand | 152 images |
| Amelanchier stolonifera Wiegand | 7 images |
| Ammannia robusta Heer & Regel | 5 images |
| Ammophila arenaria (L.) Link | 1451 images |
| Ammophila breviligulata Fernald | 46 images |
| Amorpha canescens Pursh | 209 images |
| Amorpha fruticosa L. | 1796 images |
| Amphicarpaea bracteata (L.) Fernald | 413 images |
| Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. | 3 images |
| Anagallis arvensis L. | 1396 images |
| Anaphalis margaritacea (L.) Benth. | 12 images |
| Anchusa azurea Mill. | 2887 images |
| Anchusa officinalis L. | 4317 images |
| Andromeda polifolia L. | 543 images |
| Andropogon virginicus L. | 3 images |
| Androsace chamaejasme Wulfen | 122 images |
| Androsace occidentalis Pursh | 5 images |
| Androsace septentrionalis L. | 149 images |
| Anemone blanda Schott & Kotschy | 3019 images |
| Anemone canadensis L. | 746 images |
| Anemone lithophila Rydb. | 1 images |
| Anemone multifida Poir. | 97 images |
| Anemone narcissiflora L. | 981 images |
| Anemone parviflora Michx. | 15 images |
| Anemone quinquefolia L. | 919 images |
| Anemone ranunculoides L. | 3019 images |
| Anemone virginiana L. | 315 images |
| Anethum graveolens L. | 2417 images |
| Angelica arguta Nutt. | 6 images |
| Angelica atropurpurea L. | 369 images |
| Angelica lucida L. | 43 images |
| Angelica sylvestris L. | 9118 images |
| Anisocarpus madioides Nutt. | 14 images |
| Antennaria alpina (L.) Gaertn. | 29 images |
| Antennaria howellii Greene | 20 images |
| Antennaria media Greene | 5 images |
| Antennaria microphylla Rydb. | 5 images |
| Antennaria monocephala DC. | 2 images |
| Antennaria neglecta Greene | 147 images |
| Antennaria parlinii Fernald | 19 images |
| Antennaria parvifolia Nutt. | 86 images |
| Antennaria rosea Greene | 2 images |
| Antennaria umbrinella Rydb. | 1 images |
| Anthemis arvensis L. | 3633 images |
| Anthemis cotula L. | 1464 images |
| Anthemis tinctoria L. | 14 images |
| Anthoxanthum aristatum Boiss. | 60 images |
| Anthoxanthum odoratum L. | 1998 images |
| Anthriscus cerefolium (L.) Hoffm. | 2758 images |
| Anthriscus sylvestris (L.) Hoffm. | 18418 images |
| Anthyllis vulneraria L. | 7874 images |
| Antirrhinum majus L. | 14282 images |
| Aphanes arvensis L. | 409 images |
| Apios americana Medik. | 294 images |
| Apium graveolens L. | 1837 images |
| Aplectrum hyemale (Muhl. ex Willd.) Torr. | 28 images |
| Apocynum androsaemifolium L. | 981 images |
| Apocynum cannabinum L. | 860 images |
| Aquilegia brevistyla Hook. | 1 images |
| Aquilegia canadensis L. | 1712 images |
| Aquilegia formosa Fisch. ex DC. | 59 images |
| Aquilegia jonesii Parry | 2 images |
| Aquilegia vulgaris L. | 19868 images |
| Arabidopsis thaliana (L.) Heynh. | 1991 images |
| Arabis alpina L. | 1663 images |
| Arabis hirsuta (L.) Scop. | 1236 images |
| Aralia elata (Miq.) Seem. | 720 images |
| Aralia hispida Vent. | 63 images |
| Aralia nudicaulis L. | 770 images |
| Aralia racemosa L. | 264 images |
| Arbutus menziesii Pursh | 771 images |
| Arceuthobium campylopodum Engelm. | 33 images |
| Arceuthobium douglasii Engelm. | 4 images |
| Arctium lappa L. | 9582 images |
| Arctium tomentosum Mill. | 1866 images |
| Arctostaphylos columbiana Piper | 24 images |
| Arctostaphylos uva-ursi (L.) Spreng. | 1952 images |
| Arenaria serpyllifolia L. | 1217 images |
| Arethusa bulbosa L. | 42 images |
| Argemone mexicana L. | 1083 images |
| Argentina anserina (L.) Rydb. | 4420 images |
| Arisaema dracontium (L.) Schott | 328 images |
| Arisaema triphyllum (L.) Schott | 1944 images |
| Aristida purpurea Nutt. | 7 images |
| Aristolochia clematitis L. | 2696 images |
| Aristolochia macrophylla Lam. | 679 images |
| Armeria maritima (Mill.) Willd. | 5272 images |
| Arnica angustifolia Vahl | 2 images |
| Arnica chamissonis Less. | 82 images |
| Arnica cordifolia Hook. | 189 images |
| Arnica fulgens Pursh | 4 images |
| Arnica gracilis Rydb. | 1 images |
| Arnica lanceolata Nutt. | 20 images |
| Arnica latifolia Bong. | 31 images |
| Arnica lonchophylla Greene | 4 images |
| Arnica mollis Hook. | 19 images |
| Arnica rydbergii Greene | 3 images |
| Arnica sororia Greene | 3 images |
| Arnoglossum plantagineum Raf. | 47 images |
| Arnoseris minima (L.) Schweigg. & Körte | 95 images |
| Aronia arbutifolia (L.) Pers. | 140 images |
| Aronia melanocarpa (Michx.) Elliott | 2895 images |
| Artemisia abrotanum L. | 1281 images |
| Artemisia absinthium L. | 4624 images |
| Artemisia annua L. | 3334 images |
| Artemisia biennis Willd. | 132 images |
| Artemisia campestris L. | 1526 images |
| Artemisia cana Pursh | 28 images |
| Artemisia dracunculus L. | 2171 images |
| Artemisia frigida Willd. | 103 images |
| Artemisia laciniata Willd. | 1 images |
| Artemisia ludoviciana Nutt. | 1065 images |
| Artemisia michauxiana Besser | 5 images |
| Artemisia pontica L. | 72 images |
| Artemisia stelleriana Besser | 165 images |
| Artemisia suksdorfii Piper | 47 images |
| Artemisia tilesii Ledeb. | 7 images |
| Artemisia tridentata Nutt. | 315 images |
| Artemisia vulgaris L. | 16290 images |
| Aruncus dioicus (Walter) Fernald | 4298 images |
| Asarum canadense L. | 573 images |
| Asarum caudatum Lindl. | 172 images |
| Asclepias exaltata L. | 94 images |
| Asclepias hirtella (Pennell) Woodson | 16 images |
| Asclepias incarnata L. | 1074 images |
| Asclepias lanuginosa Nutt. | 5 images |
| Asclepias ovalifolia Decne. | 6 images |
| Asclepias purpurascens L. | 504 images |
| Asclepias quadrifolia Jacq. | 88 images |
| Asclepias speciosa Torr. | 680 images |
| Asclepias sullivantii Engelm. ex A. Gray | 8 images |
| Asclepias syriaca L. | 3526 images |
| Asclepias tuberosa L. | 2148 images |
| Asclepias variegata L. | 133 images |
| Asclepias verticillata L. | 184 images |
| Asclepias viridiflora Raf. | 210 images |
| Asimina triloba (L.) Dunal | 1310 images |
| Asparagus officinalis L. | 2955 images |
| Asperugo procumbens L. | 374 images |
| Asperula arvensis L. | 153 images |
| Aspidotis densa (Brack.) Lellinger | 54 images |
| Asplenium adulterinum Milde | 17 images |
| Asplenium platyneuron (L.) Britton, Sterns & Poggenb. | 343 images |
| Asplenium rhizophyllum L. | 78 images |
| Asplenium ruta-muraria L. | 1831 images |
| Asplenium scolopendrium L. | 5989 images |
| Asplenium trichomanes L. | 5558 images |
| Asplenium trichomanes-ramosum L. | 63 images |
| Aster alpinus L. | 3141 images |
| Astragalus alpinus L. | 338 images |
| Astragalus australis (L.) Lam. | 142 images |
| Astragalus canadensis L. | 42 images |
| Astragalus cicer L. | 338 images |
| Astragalus crassicarpus Nutt. | 60 images |
| Astragalus glycyphyllos L. | 1572 images |
| Astragalus lotiflorus Hook. | 7 images |
| Astragalus missouriensis Nutt. | 24 images |
| Astragalus racemosus Pursh | 14 images |
| Astragalus tenellus Pursh | 1 images |
| Athyrium filix-femina (L.) Roth | 3494 images |
| Athysanus pusillus (Hook.) Greene | 1 images |
| Atriplex argentea Nutt. | 3 images |
| Atriplex canescens (Pursh) Nutt. | 146 images |
| Atriplex glabriuscula Edmondston | 86 images |
| Atriplex hortensis L. | 1004 images |
| Atriplex laciniata L. | 460 images |
| Atriplex littoralis L. | 287 images |
| Atriplex micrantha Ledeb. | 66 images |
| Atriplex oblongifolia Waldst. & Kit. | 15 images |
| Atriplex patula L. | 693 images |
| Atriplex prostrata Bouchér ex DC. | 3 images |
| Atriplex rosea L. | 38 images |
| Aureolaria flava (L.) Farw. | 50 images |
| Aureolaria virginica (L.) Pennell | 34 images |
| Aurinia saxatilis (L.) Desv. | 2586 images |
| Avena fatua L. | 2360 images |
| Avena sativa L. | 3575 images |
| Avena sterilis L. | 241 images |
| Avenula pubescens (Huds.) Dumort. | 86 images |
| Azolla caroliniana Willd. | 14 images |
| Azolla filiculoides Lam. | 344 images |
| Bacopa rotundifolia (Michx.) Wettst. | 6 images |
| Baldellia ranunculoides (L.) Parl. | 397 images |
| Ballota nigra L. | 4733 images |
| Balsamorhiza deltoidea Nutt. | 4 images |
| Balsamorhiza sagittata (Pursh) Nutt. | 197 images |
| Baptisia australis (L.) R. Br. | 2 images |
| Baptisia tinctoria (L.) R. Br. | 2 images |
| Barbarea orthoceras Ledeb. | 396 images |
| Barbarea verna (Mill.) Asch. | 1282 images |
| Bartsia alpina L. | 1072 images |
| Beckmannia syzigachne (Steud.) Fernald | 16 images |
| Bellis perennis L. | 14264 images |
| Berberis thunbergii DC. | 8320 images |
| Berberis vulgaris L. | 4839 images |
| Berteroa incana (L.) DC. | 4571 images |
| Berula erecta (Huds.) Coville | 756 images |
| Betula alleghaniensis Britton | 233 images |
| Betula glandulosa Michx. | 7 images |
| Betula lenta L. | 115 images |
| Betula nana L. | 321 images |
| Betula neoalaskana Sarg. | 3 images |
| Betula occidentalis Hook. | 36 images |
| Betula papyrifera Marshall | 437 images |
| Betula pendula Roth | 10758 images |
| Betula populifolia Marshall | 57 images |
| Betula pubescens Ehrh. | 4860 images |
| Betula pumila L. | 8 images |
| Bidens aristosa (Michx.) Britton | 128 images |
| Bidens bipinnata L. | 1241 images |
| Bidens cernua L. | 466 images |
| Bidens connata Muhl. ex Willd. | 59 images |
| Bidens frondosa L. | 2716 images |
| Bidens pilosa L. | 2794 images |
| Bidens tripartita L. | 1082 images |
| Bidens vulgata Greene | 63 images |
| Blechnum spicant (L.) Sm. | 648 images |
| Blephilia hirsuta (Pursh) Benth. | 80 images |
| Boehmeria cylindrica (L.) Sw. | 538 images |
| Bolboschoenus maritimus (L.) Palla | 699 images |
| Boltonia asteroides (L.) L'Hér. | 22 images |
| Borago officinalis L. | 18454 images |
| Boschniakia hookeri Walp. | 1 images |
| Botrychium dissectum Spreng. | 148 images |
| Botrychium lunaria (L.) Sw. | 481 images |
| Botrychium virginianum (L.) Sw. | 212 images |
| Bouteloua curtipendula (Michx.) Torr. | 114 images |
| Brassica juncea (L.) Czern. | 1234 images |
| Brassica napus L. | 9116 images |
| Brassica oleracea L. | 8145 images |
| Brassica rapa L. | 3529 images |
| Brickellia grandiflora (Hook.) Nutt. | 8 images |
| Brickellia oblongifolia Nutt. | 3 images |
| Briza maxima L. | 1732 images |
| Briza media L. | 866 images |
| Briza minor L. | 309 images |
| Bromus arvensis L. | 139 images |
| Bromus carinatus Hook. & Arn. | 6 images |
| Bromus catharticus Vahl | 183 images |
| Bromus diandrus Roth | 258 images |
| Bromus erectus Huds. | 97 images |
| Bromus hordeaceus L. | 2535 images |
| Bromus inermis Leyss. | 248 images |
| Bromus lanceolatus Roth | 62 images |
| Bromus latiglumis (Shear) Hitchc. | 2 images |
| Bromus marginatus Nees ex Steud. | 1 images |
| Bromus pubescens Muhl. ex Willd. | 5 images |
| Bromus racemosus L. | 177 images |
| Bromus secalinus L. | 224 images |
| Bromus sitchensis Trin. | 5 images |
| Bromus squarrosus L. | 96 images |
| Bromus sterilis L. | 236 images |
| Bromus tectorum L. | 138 images |
| Bromus vulgaris (Hook.) Shear | 1 images |
| Bryonia dioica Jacq. | 4 images |
| Buddleja davidii Franch. | 16378 images |
| Bunias orientalis L. | 2082 images |
| Bupleurum rotundifolium L. | 453 images |
| Butomus umbellatus L. | 1536 images |
| Cakile edentula (Bigelow) Hook. | 229 images |
| Cakile maritima Scop. | 5874 images |
| Calamagrostis sesquiflora (Trin.) Tzvelev | 4 images |
| Calamagrostis stricta (Timm) Koeler | 24 images |
| Calandrinia ciliata (Ruiz & Pav.) DC. | 24 images |
| Calendula arvensis L. | 5396 images |
| Calendula officinalis L. | 14916 images |
| Calla palustris L. | 1273 images |
| Callitriche hermaphroditica L. | 7 images |
| Callitriche heterophylla Pursh | 3 images |
| Callitriche marginata Torr. | 8 images |
| Callitriche palustris L. | 359 images |
| Callitriche stagnalis Scop. | 598 images |
| Callitriche terrestris Raf. | 5 images |
| Calluna vulgaris (L.) Hull | 8427 images |
| Calochortus apiculatus Baker | 24 images |
| Calochortus lyallii Baker | 14 images |
| Calochortus macrocarpus Douglas | 71 images |
| Calopogon tuberosus (L.) Britton, Sterns & Poggenb. | 72 images |
| Caltha leptosepala DC. | 140 images |
| Caltha palustris L. | 9913 images |
| Calypso bulbosa (L.) Oakes | 423 images |
| Calystegia hederacea Wall. | 10 images |
| Calystegia sepium (L.) R. Br. | 17 images |
| Calystegia silvatica (Kit.) Griseb. | 588 images |
| Calystegia soldanella (L.) R. Br. | 2 images |
| Calystegia spithamaea (L.) Pursh | 17 images |
| Camassia quamash (Pursh) Greene | 643 images |
| Camassia scilloides (Raf.) Cory | 136 images |
| Camelina microcarpa Andrz. ex DC. | 94 images |
| Camelina sativa (L.) Crantz | 209 images |
| Campanula aparinoides Pursh | 20 images |
| Campanula glomerata L. | 7020 images |
| Campanula lasiocarpa Cham. | 14 images |
| Campanula latifolia L. | 1398 images |
| Campanula medium L. | 2560 images |
| Campanula persicifolia L. | 8805 images |
| Campanula rapunculoides L. | 4688 images |
| Campanula rotundifolia L. | 6974 images |
| Campanula trachelium L. | 9196 images |
| Campanula uniflora L. | 2 images |
| Campanulastrum americanum (L.) Small | 79 images |
| Campsis radicans (L.) Seem. ex Bureau | 14 images |
| Cannabis sativa L. | 5223 images |
| Capsella bursa-pastoris (L.) Medik. | 9389 images |
| Caragana arborescens Lam. | 1487 images |
| Cardamine angulata Hook. | 8 images |
| Cardamine bellidifolia L. | 27 images |
| Cardamine bulbosa (Schreb. ex Muhl.) Britton, Sterns & Poggenb. | 20 images |
| Cardamine douglassii Britton | 6 images |
| Cardamine flexuosa With. | 5159 images |
| Cardamine hirsuta L. | 3930 images |
| Cardamine impatiens L. | 1556 images |
| Cardamine nuttallii Greene | 55 images |
| Cardamine oligosperma Nutt. | 52 images |
| Cardamine parviflora L. | 1758 images |
| Cardamine pensylvanica Muhl. ex Willd. | 4 images |
| Cardamine pratensis L. | 16045 images |
| Cardaria draba (L.) Desv. | 2 images |
| Carduus acanthoides L. | 3178 images |
| Carduus crispus L. | 657 images |
| Carduus nutans L. | 4266 images |
| Carex acutiformis Ehrh. | 1671 images |
| Carex amplifolia Boott | 1 images |
| Carex aquatilis Wahlenb. | 19 images |
| Carex arcta Boott | 6 images |
| Carex atherodes Spreng. | 5 images |
| Carex atrofusca Schkuhr | 55 images |
| Carex aurea Nutt. | 14 images |
| Carex baileyi Britton | 1 images |
| Carex bicolor Bellardi ex All. | 60 images |
| Carex bigelowii Torr. ex Schwein. | 23 images |
| Carex blanda Dewey | 27 images |
| Carex brunnescens (Pers.) Poir. | 40 images |
| Carex buxbaumii Wahlenb. | 71 images |
| Carex canescens L. | 124 images |
| Carex capillaris L. | 51 images |
| Carex careyana Torr. ex Dewey | 5 images |
| Carex cephalophora Muhl. ex Willd. | 18 images |
| Carex comosa Boott | 41 images |
| Carex crinita Lam. | 59 images |
| Carex cryptolepis Mack. | 8 images |
| Carex deweyana Schwein. | 7 images |
| Carex diandra Schrank | 75 images |
| Carex disperma Dewey | 3 images |
| Carex disticha Huds. | 107 images |
| Carex divulsa Stokes | 589 images |
| Carex eburnea Boott | 25 images |
| Carex echinata Murray | 262 images |
| Carex emoryi Dewey | 8 images |
| Carex filifolia Nutt. | 8 images |
| Carex flacca Schreb. | 1786 images |
| Carex flava L. | 268 images |
| Carex folliculata L. | 5 images |
| Carex formosa Dewey | 1 images |
| Carex frankii Kunth | 17 images |
| Carex garberi Fernald | 1 images |
| Carex glacialis Mack. | 53 images |
| Carex gracillima Schwein. | 20 images |
| Carex granularis Muhl. ex Willd. | 5 images |
| Carex grayi Carey | 4 images |
| Carex grisea Wahlenb. | 17 images |
| Carex hirsutella Mack. | 13 images |
| Carex hirta L. | 715 images |
| Carex hirtifolia Mack. | 8 images |
| Carex hitchcockiana Dewey | 1 images |
| Carex hoodii Boott | 3 images |
| Carex hostiana DC. | 74 images |
| Carex hyalinolepis Steud. | 5 images |
| Carex hystericina Muhl. ex Willd. | 30 images |
| Carex intumescens Rudge | 102 images |
| Carex jamesii Schwein. | 7 images |
| Carex lachenalii Schkuhr | 45 images |
| Carex lacustris Willd. | 10 images |
| Carex laeviconica Dewey | 3 images |
| Carex laeviculmis Meinsh. | 3 images |
| Carex laevivaginata (Kük.) Mack. | 1 images |
| Carex lasiocarpa Ehrh. | 51 images |
| Carex laxiflora Lam. | 7 images |
| Carex lenticularis Michx. | 5 images |
| Carex leptopoda Mack. | 4 images |
| Carex limosa L. | 112 images |
| Carex livida (Wahlenb.) Willd. | 6 images |
| Carex longii Mack. | 10 images |
| Carex lupuliformis Sartwell ex Dewey | 8 images |
| Carex lupulina Muhl. ex Willd. | 82 images |
| Carex lurida Wahlenb. | 98 images |
| Carex luzulina Olney | 8 images |
| Carex lyngbyei Hornem. | 8 images |
| Carex macrocephala Willd. ex Spreng. | 6 images |
| Carex magellanica Lam. | 67 images |
| Carex maritima Gunnerus | 32 images |
| Carex meadii Dewey | 6 images |
| Carex mesochorea Mack. | 2 images |
| Carex michauxiana Boeckeler | 3 images |
| Carex microglochin Wahlenb. | 77 images |
| Carex microptera Mack. | 5 images |
| Carex muricata L. | 71 images |
| Carex muskingumensis Schwein. | 114 images |
| Carex nigra (L.) Reichard | 466 images |
| Carex nigromarginata Schwein. | 3 images |
| Carex normalis Mack. | 13 images |
| Carex norvegica Retz. | 21 images |
| Carex obtusata Lilj. | 5 images |
| Carex oligosperma Michx. | 7 images |
| Carex paleacea Schreb. ex Wahlenb. | 8 images |
| Carex pallescens L. | 281 images |
| Carex panicea L. | 213 images |
| Carex pauciflora Lightf. | 87 images |
| Carex paysonis Clokey | 4 images |
| Carex pedunculata Muhl. ex Willd. | 21 images |
| Carex pensylvanica Lam. | 80 images |
| Carex phaeocephala Piper | 1 images |
| Carex plantaginea Lam. | 164 images |
| Carex praticola Rydb. | 1 images |
| Carex pseudocyperus L. | 442 images |
| Carex pyrenaica Wahlenb. | 51 images |
| Carex radiata (Wahlenb.) Small | 36 images |
| Carex rariflora (Wahlenb.) Sm. | 2 images |
| Carex raynoldsii Dewey | 1 images |
| Carex retrorsa Schwein. | 4 images |
| Carex rostrata Stokes | 317 images |
| Carex rupestris All. | 51 images |
| Carex sartwellii Dewey | 4 images |
| Carex saxatilis L. | 19 images |
| Carex scabrata Schwein. | 10 images |
| Carex scirpoidea Michx. | 2 images |
| Carex sparganioides Muhl. ex Willd. | 15 images |
| Carex spectabilis Dewey | 5 images |
| Carex spicata Huds. | 343 images |
| Carex sprengelii Dewey ex Spreng. | 6 images |
| Carex squarrosa L. | 29 images |
| Carex sterilis Willd. | 3 images |
| Carex stipata Muhl. ex Willd. | 51 images |
| Carex stricta Lam. | 45 images |
| Carex subspathacea Wormsk. ex Hornem. | 4 images |
| Carex supina Willd. ex Wahlenb. | 2 images |
| Carex swanii (Fernald) Mack. | 4 images |
| Carex sylvatica Huds. | 1219 images |
| Carex tenera Dewey | 8 images |
| Carex tenuiflora Wahlenb. | 2 images |
| Carex torta Boott ex Tuck. | 2 images |
| Carex tribuloides Wahlenb. | 15 images |
| Carex trichocarpa Muhl. ex Willd. | 15 images |
| Carex tumulicola Mack. | 2 images |
| Carex typhina Michx. | 4 images |
| Carex utriculata Boott | 8 images |
| Carex vaginata Tausch | 62 images |
| Carex vallicola Dewey | 2 images |
| Carex virescens Muhl. ex Willd. | 5 images |
| Carex viridula Michx. | 1 images |
| Carex vulpinoidea Michx. | 109 images |
| Carex woodii Dewey | 2 images |
| Carpinus caroliniana Walter | 348 images |
| Carthamus lanatus L. | 1506 images |
| Carthamus tinctorius L. | 906 images |
| Carum carvi L. | 1149 images |
| Carya glabra (Mill.) Sweet | 1898 images |
| Carya ovata (Mill.) K. Koch | 8 images |
| Castanea dentata (Marshall) Borkh. | 648 images |
| Castilleja ambigua Hook. & Arn. | 1 images |
| Castilleja coccinea (L.) Spreng. | 104 images |
| Castilleja cusickii Greenm. | 17 images |
| Castilleja elegans Malte | 4 images |
| Castilleja hispida Benth. | 29 images |
| Castilleja levisecta Greenm. | 6 images |
| Castilleja miniata Douglas ex Hook. | 1 images |
| Castilleja occidentalis Torr. | 14 images |
| Castilleja parviflora Bong. | 103 images |
| Castilleja rhexiifolia Rydb. | 9 images |
| Castilleja rupicola Piper ex Fernald | 16 images |
| Castilleja septentrionalis Lindl. | 1 images |
| Castilleja sessiliflora Pursh | 14 images |
| Castilleja sulphurea Rydb. | 25 images |
| Castilleja thompsonii Pennell | 9 images |
| Catalpa bignonioides Walter | 13571 images |
| Catalpa ovata G. Don | 7 images |
| Catalpa speciosa (Warder) Warder ex Engelm. | 4 images |
| Caulophyllum thalictroides (L.) Michx. | 432 images |
| Ceanothus americanus L. | 638 images |
| Ceanothus herbaceus Raf. | 31 images |
| Ceanothus sanguineus Pursh | 14 images |
| Ceanothus velutinus Douglas ex Hook. | 96 images |
| Celastrus orbiculatus Thunb. | 670 images |
| Celastrus scandens L. | 896 images |
| Celtis occidentalis L. | 3429 images |
| Celtis tenuifolia Nutt. | 33 images |
| Cenchrus longispinus (Hack.) Fernald | 80 images |
| Centaurea calcitrapa L. | 1586 images |
| Centaurea cyanus L. | 1797 images |
| Centaurea diffusa Lam. | 169 images |
| Centaurea jacea L. | 13736 images |
| Centaurea macrocephala Puschk. ex Willd. | 3 images |
| Centaurea melitensis L. | 740 images |
| Centaurea montana L. | 1000 images |
| Centaurea nigra L. | 7654 images |
| Centaurea nigrescens Willd. | 656 images |
| Centaurea scabiosa L. | 7956 images |
| Centaurea solstitialis L. | 1228 images |
| Centaurea stoebe L. | 742 images |
| Centaurium erythraea Rafn | 7097 images |
| Centaurium pulchellum (Sw.) Druce | 697 images |
| Cephalanthus occidentalis L. | 1212 images |
| Cerastium alpinum L. | 1016 images |
| Cerastium arcticum Lange | 3 images |
| Cerastium arvense L. | 4743 images |
| Cerastium beeringianum Cham. & Schltdl. | 1 images |
| Cerastium cerastoides (L.) Britton | 118 images |
| Cerastium fontanum Baumg. | 3485 images |
| Cerastium glomeratum Thuill. | 4262 images |
| Cerastium nutans Raf. | 6 images |
| Cerastium regelii Ostenf. | 1 images |
| Cerastium semidecandrum L. | 456 images |
| Cerastium tomentosum L. | 5767 images |
| Ceratophyllum demersum L. | 291 images |
| Cercis canadensis L. | 5919 images |
| Cerinthe major L. | 1952 images |
| Chaenactis douglasii (Hook.) Hook. & Arn. | 5 images |
| Chaenomeles japonica (Thunb.) Lindl. ex Spach | 10030 images |
| Chaenorhinum minus (L.) Lange | 634 images |
| Chaerophyllum procumbens (L.) Crantz | 15 images |
| Chaerophyllum temulum L. | 4941 images |
| Chamaedaphne calyculata (L.) Moench | 152 images |
| Chamaerhodos erecta (L.) Bunge | 1 images |
| Chamaesyce maculata (L.) Small | 1 images |
| Chamaesyce nutans (Lag.) Small | 1 images |
| Chamaesyce serpens (Kunth) Small | 64 images |
| Chamerion angustifolium (L.) Holub | 226 images |
| Chamerion latifolium (L.) Holub | 44 images |
| Chelidonium majus L. | 24127 images |
| Chelone glabra L. | 438 images |
| Chenopodium album L. | 14498 images |
| Chenopodium berlandieri Moq. | 47 images |
| Chenopodium bonus-henricus L. | 143 images |
| Chenopodium capitatum (L.) Asch. | 49 images |
| Chenopodium chenopodioides (L.) Aellen | 9 images |
| Chenopodium ficifolium Sm. | 1269 images |
| Chenopodium glaucum L. | 20 images |
| Chenopodium murale L. | 335 images |
| Chenopodium polyspermum L. | 104 images |
| Chenopodium pratericola Rydb. | 17 images |
| Chenopodium rubrum L. | 72 images |
| Chenopodium standleyanum Aellen | 3 images |
| Chenopodium urbicum L. | 2 images |
| Chenopodium vulvaria L. | 755 images |
| Chimaphila maculata (L.) Pursh | 734 images |
| Chondrilla juncea L. | 1881 images |
| Chorispora tenella (Pall.) DC. | 193 images |
| Chrysanthemum arcticum L. | 3 images |
| Chrysosplenium alternifolium L. | 1803 images |
| Chrysosplenium americanum Schwein. ex Hook. | 24 images |
| Chrysothamnus viscidiflorus (Hook.) Nutt. | 213 images |
| Cicer arietinum L. | 846 images |
| Cichorium intybus L. | 19189 images |
| Cicuta bulbifera L. | 34 images |
| Cicuta maculata L. | 307 images |
| Cicuta virosa L. | 456 images |
| Cinna arundinacea L. | 15 images |
| Circaea alpina L. | 241 images |
| Circaea lutetiana L. | 5591 images |
| Cirsium arvense (L.) Scop. | 15153 images |
| Cirsium brevistylum Cronquist | 66 images |
| Cirsium discolor (Muhl. ex Willd.) Spreng. | 188 images |
| Cirsium edule Nutt. | 36 images |
| Cirsium hookerianum Nutt. | 13 images |
| Cirsium muticum Michx. | 69 images |
| Cirsium palustre (L.) Scop. | 3801 images |
| Cirsium scariosum Nutt. | 7 images |
| Cirsium vulgare (Savi) Ten. | 19504 images |
| Cladium mariscoides (Muhl.) Torr. | 3 images |
| Cladrastis kentukea (Dum. Cours.) Rudd | 6 images |
| Clarkia amoena (Lehm.) A. Nelson & J.F. Macbr. | 2 images |
| Clarkia pulchella Pursh | 49 images |
| Claytonia caroliniana Michx. | 282 images |
| Claytonia perfoliata Donn ex Willd. | 3107 images |
| Claytonia rubra (Howell) Tidestr. | 66 images |
| Claytonia sibirica L. | 872 images |
| Claytonia virginica L. | 1133 images |
| Clematis campaniflora Brot. | 4 images |
| Clematis integrifolia L. | 650 images |
| Clematis ligusticifolia Nutt. | 87 images |
| Clematis occidentalis (Hornem.) DC. | 47 images |
| Clematis orientalis L. | 79 images |
| Clematis recta L. | 775 images |
| Clematis tangutica (Maxim.) Korsh. | 606 images |
| Clematis terniflora DC. | 869 images |
| Clematis viorna L. | 74 images |
| Clematis virginiana L. | 785 images |
| Clematis vitalba L. | 18416 images |
| Clematis viticella L. | 5031 images |
| Cleome serrulata Pursh | 31 images |
| Clethra alnifolia L. | 844 images |
| Clinopodium arkansanum (Nutt.) House | 1 images |
| Clinopodium glabellum (Michx.) Kuntze | 14 images |
| Clinopodium vulgare L. | 7281 images |
| Clintonia borealis (Aiton) Raf. | 679 images |
| Cnicus benedictus L. | 1 images |
| Cochlearia groenlandica L. | 8 images |
| Collinsia verna Nutt. | 69 images |
| Collinsonia canadensis L. | 111 images |
| Collomia grandiflora Douglas ex Lindl. | 300 images |
| Collomia linearis Nutt. | 34 images |
| Colutea arborescens L. | 3166 images |
| Comandra umbellata (L.) Nutt. | 84 images |
| Comarum palustre L. | 994 images |
| Commelina communis L. | 1956 images |
| Conium maculatum L. | 7401 images |
| Conoclinium coelestinum (L.) DC. | 15 images |
| Conopholis americana (L.) Wallr. | 301 images |
| Conringia orientalis (L.) Dumort. | 74 images |
| Consolida ajacis (L.) Schur | 545 images |
| Consolida regalis Gray | 244 images |
| Convallaria majalis L. | 6666 images |
| Convolvulus arvensis L. | 16080 images |
| Conyza canadensis (L.) Cronquist | 3598 images |
| Conyza ramosissima Cronquist | 21 images |
| Coptis trifolia (L.) Salisb. | 240 images |
| Corallorhiza maculata (Raf.) Raf. | 1 images |
| Corallorhiza mertensiana Bong. | 113 images |
| Corallorhiza striata Lindl. | 130 images |
| Coreopsis grandiflora Hogg ex Sweet | 2432 images |
| Coreopsis lanceolata L. | 2598 images |
| Coreopsis rosea Nutt. | 5 images |
| Coreopsis tinctoria Nutt. | 3013 images |
| Coreopsis tripteris L. | 158 images |
| Coreopsis verticillata L. | 1806 images |
| Coriandrum sativum L. | 3076 images |
| Corispermum americanum (Nutt.) Nutt. | 2 images |
| Corispermum pallasii Steven | 103 images |
| Cornus alternifolia L. f. | 1 images |
| Cornus canadensis L. | 1320 images |
| Cornus florida L. | 5142 images |
| Cornus racemosa Lam. | 429 images |
| Cornus rugosa Lam. | 158 images |
| Cornus sericea L. | 6815 images |
| Cornus suecica L. | 558 images |
| Cornus unalaschkensis Ledeb. | 6 images |
| Coronopus didymus (L.) Sm. | 19 images |
| Corrigiola litoralis L. | 368 images |
| Corydalis aurea Willd. | 93 images |
| Corydalis flavula (Raf.) DC. | 96 images |
| Corydalis scouleri Hook. | 31 images |
| Corydalis sempervirens (L.) Pers. | 81 images |
| Corydalis solida (L.) Clairv. | 5409 images |
| Corylus americana Walter | 62 images |
| Corylus avellana L. | 20673 images |
| Corylus cornuta Marshall | 968 images |
| Cosmos bipinnatus Cav. | 12743 images |
| Cotinus coggygria Scop. | 12621 images |
| Cotoneaster acutifolius Turcz. | 201 images |
| Cotoneaster horizontalis Decne. | 5396 images |
| Cotoneaster simonsii Baker | 51 images |
| Cotula coronopifolia L. | 478 images |
| Crataegus brainerdii Sarg. | 3 images |
| Crataegus calpodendron (Ehrh.) Medik. | 10 images |
| Crataegus canadensis Sarg. | 113 images |
| Crataegus chrysocarpa Ashe | 6 images |
| Crataegus coccinioides Ashe | 19 images |
| Crataegus crus-galli L. | 602 images |
| Crataegus douglasii Lindl. | 353 images |
| Crataegus holmesiana Ashe | 16 images |
| Crataegus intricata Lange | 8 images |
| Crataegus irrasa Sarg. | 3 images |
| Crataegus laevigata (Poir.) DC. | 11853 images |
| Crataegus macrosperma Ashe | 9 images |
| Crataegus mollis Scheele | 1 images |
| Crataegus monogyna Jacq. | 24471 images |
| Crataegus pedicellata Sarg. | 4 images |
| Crataegus persimilis Sarg. | 475 images |
| Crataegus punctata Jacq. | 70 images |
| Crataegus scabrida Sarg. | 2 images |
| Crataegus submollis Sarg. | 68 images |
| Crataegus succulenta Schrad. ex Link | 14 images |
| Crepis biennis L. | 4099 images |
| Crepis capillaris (L.) Wallr. | 8984 images |
| Crepis modocensis Greene | 6 images |
| Crepis occidentalis Nutt. | 45 images |
| Crepis pulchra L. | 784 images |
| Crepis tectorum L. | 233 images |
| Crepis vesicaria L. | 3052 images |
| Crocidium multicaule Hook. | 19 images |
| Crocus vernus (L.) Hill | 5924 images |
| Croton capitatus Michx. | 206 images |
| Crypsis alopecuroides (Piller & Mitterp.) Schrad. | 54 images |
| Crypsis schoenoides (L.) Lam. | 88 images |
| Cryptantha minima Rydb. | 1 images |
| Cryptogramma acrostichoides R. Br. | 31 images |
| Cryptotaenia canadensis (L.) DC. | 218 images |
| Cucumis melo L. | 4355 images |
| Cucumis sativus L. | 4593 images |
| Cucurbita pepo L. | 5064 images |
| Cuphea viscosissima Jacq. | 45 images |
| Cuscuta approximata Bab. | 34 images |
| Cuscuta cephalanthi Engelm. | 3 images |
| Cuscuta compacta Juss. ex Choisy | 1 images |
| Cuscuta epilinum Weihe | 14 images |
| Cuscuta epithymum (L.) L. | 1063 images |
| Cuscuta gronovii Willd. ex Schult. | 4 images |
| Cuscuta indecora Choisy | 15 images |
| Cuscuta pentagona Engelm. | 12 images |
| Cuscuta polygonorum Engelm. | 2 images |
| Cuscuta salina Engelm. | 73 images |
| Cyclachaena xanthiifolia (Nutt.) Fresen. | 12 images |
| Cydonia oblonga Mill. | 9634 images |
| Cynanchum laeve (Michx.) Pers. | 176 images |
| Cynanchum louiseae Kartesz & Gandhi | 1 images |
| Cynodon dactylon (L.) Pers. | 2375 images |
| Cynoglossum officinale L. | 2841 images |
| Cynoglossum virginianum L. | 179 images |
| Cynosurus cristatus L. | 630 images |
| Cynosurus echinatus L. | 540 images |
| Cyperus bipartitus Torr. | 4 images |
| Cyperus eragrostis Lam. | 2286 images |
| Cyperus esculentus L. | 783 images |
| Cyperus flavescens L. | 58 images |
| Cyperus fuscus L. | 310 images |
| Cyperus odoratus L. | 109 images |
| Cyperus squarrosus L. | 25 images |
| Cyperus strigosus L. | 276 images |
| Cypripedium acaule Aiton | 814 images |
| Cypripedium candidum Muhl. ex Willd. | 44 images |
| Cypripedium guttatum Sw. | 6 images |
| Cypripedium montanum Douglas ex Lindl. | 95 images |
| Cypripedium parviflorum Salisb. | 295 images |
| Cypripedium passerinum Richardson | 14 images |
| Cypripedium reginae Walter | 184 images |
| Cystopteris bulbifera (L.) Bernh. | 87 images |
| Cystopteris fragilis (L.) Bernh. | 1001 images |
| Cystopteris montana (Lam.) Bernh. ex Desv. | 1 images |
| Cystopteris protrusa (Weath.) Blasdell | 34 images |
| Cystopteris tenuis (Michx.) Desv. | 3 images |
| Cytisus scoparius (L.) Link | 10910 images |
| Dactylis glomerata L. | 9128 images |
| Dalea purpurea Vent. | 224 images |
| Dalea villosa (Nutt.) Spreng. | 3 images |
| Dalibarda repens L. | 24 images |
| Danthonia californica Bol. | 17 images |
| Danthonia compressa Austin | 3 images |
| Danthonia decumbens (L.) DC. | 85 images |
| Danthonia intermedia Vasey | 2 images |
| Danthonia unispicata (Thurb.) Munro ex Macoun | 21 images |
| Daphne laureola L. | 3756 images |
| Daphne mezereum L. | 4221 images |
| Darlingtonia californica Torr. | 202 images |
| Dasiphora fruticosa (L.) Rydb. | 5835 images |
| Datura inoxia Mill. | 700 images |
| Datura stramonium L. | 13999 images |
| Daucus carota L. | 24114 images |
| Daucus pusillus Michx. | 189 images |
| Decodon verticillatus (L.) Elliott | 48 images |
| Delphinium bicolor Nutt. | 9 images |
| Delphinium carolinianum Walter | 145 images |
| Delphinium depauperatum Nutt. | 9 images |
| Delphinium elatum L. | 4199 images |
| Delphinium glareosum Greene | 4 images |
| Delphinium menziesii DC. | 47 images |
| Delphinium nuttallianum Pritz. ex Walp. | 151 images |
| Dennstaedtia punctilobula (Michx.) T. Moore | 187 images |
| Deschampsia elongata (Hook.) Munro | 3 images |
| Deschampsia flexuosa (L.) Trin. | 101 images |
| Descurainia pinnata (Walter) Britton | 156 images |
| Descurainia sophia (L.) Webb ex Prantl | 746 images |
| Desmodium canadense (L.) DC. | 182 images |
| Desmodium canescens (L.) DC. | 6 images |
| Desmodium paniculatum (L.) DC. | 474 images |
| Dianthus arenarius L. | 49 images |
| Dianthus armeria L. | 2189 images |
| Dianthus barbatus L. | 10034 images |
| Dianthus chinensis L. | 1924 images |
| Dianthus deltoides L. | 3706 images |
| Dianthus gratianopolitanus Vill. | 459 images |
| Dianthus plumarius L. | 1297 images |
| Dianthus sylvestris Wulfen | 1378 images |
| Diapensia lapponica L. | 33 images |
| Dicentra canadensis (Goldie) Walp. | 147 images |
| Dicentra cucullaria (L.) Bernh. | 609 images |
| Dicentra formosa (Haw.) Walp. | 568 images |
| Dicentra uniflora Kellogg | 44 images |
| Dichanthelium clandestinum (L.) Gould | 139 images |
| Dichanthelium oligosanthes (Schult.) Gould | 25 images |
| Diervilla lonicera Mill. | 523 images |
| Digitalis grandiflora Mill. | 2235 images |
| Digitalis lanata Ehrh. | 171 images |
| Digitalis lutea L. | 2784 images |
| Digitalis purpurea L. | 19927 images |
| Digitaria sanguinalis (L.) Scop. | 2123 images |
| Dioscorea villosa L. | 264 images |
| Diplotaxis erucoides (L.) DC. | 7020 images |
| Diplotaxis muralis (L.) DC. | 789 images |
| Diplotaxis tenuifolia (L.) DC. | 5489 images |
| Dipsacus fullonum L. | 12839 images |
| Dipsacus laciniatus L. | 821 images |
| Dirca palustris L. | 70 images |
| Distichlis spicata (L.) Greene | 89 images |
| Dodecatheon jeffreyi Van Houtte | 2 images |
| Dodecatheon meadia L. | 141 images |
| Dodecatheon pulchellum (Raf.) Merr. | 2 images |
| Doellingeria umbellata (Mill.) Nees | 433 images |
| Doronicum pardalianches L. | 1894 images |
| Downingia elegans (Douglas ex Lindl.) Torr. | 1 images |
| Draba crassifolia Graham | 1 images |
| Draba fladnizensis Wulfen | 11 images |
| Draba glabella Pursh | 7 images |
| Draba incana L. | 26 images |
| Draba nemorosa L. | 75 images |
| Draba oligosperma Hook. | 6 images |
| Draba verna L. | 2408 images |
| Dracocephalum parviflorum Nutt. | 28 images |
| Dracocephalum thymiflorum L. | 11 images |
| Drosera anglica Huds. | 165 images |
| Drosera filiformis Raf. | 67 images |
| Drosera intermedia Hayne | 406 images |
| Drosera linearis Goldie | 14 images |
| Drosera rotundifolia L. | 1417 images |
| Dryas drummondii Richardson ex Hook. | 34 images |
| Dryas integrifolia Vahl | 2 images |
| Dryas octopetala L. | 2493 images |
| Dryopteris arguta (Kaulf.) Watt | 3 images |
| Dryopteris carthusiana (Vill.) H.P. Fuchs | 178 images |
| Dryopteris cristata (L.) A. Gray | 100 images |
| Dryopteris filix-mas (L.) Schott | 5873 images |
| Dryopteris intermedia (Muhl. ex Willd.) A. Gray | 298 images |
| Dryopteris marginalis (L.) A. Gray | 225 images |
| Duchesnea indica (Andrews) Teschem. | 528 images |
| Dulichium arundinaceum (L.) Britton | 35 images |
| Dysphania ambrosioides (L.) Mosyakin & Clemants | 1032 images |
| Dysphania botrys (L.) Mosyakin & Clemants | 96 images |
| Dyssodia papposa (Vent.) Hitchc. | 23 images |
| Echinacea angustifolia DC. | 1365 images |
| Echinacea pallida (Nutt.) Nutt. | 644 images |
| Echinacea purpurea (L.) Moench | 6079 images |
| Echinochloa crus-galli (L.) P. Beauv. | 2 images |
| Echinochloa frumentacea Link | 13 images |
| Echinocystis lobata (Michx.) Torr. & A. Gray | 1 images |
| Echinops exaltatus Schrad. | 220 images |
| Echinops sphaerocephalus L. | 2816 images |
| Echium plantagineum L. | 6910 images |
| Echium vulgare L. | 30610 images |
| Eclipta prostrata (L.) L. | 1237 images |
| Egeria densa Planch. | 98 images |
| Eichhornia crassipes (Mart.) Solms | 1413 images |
| Elaeagnus angustifolia L. | 4522 images |
| Elaeagnus commutata Bernh. ex Rydb. | 189 images |
| Elaeagnus umbellata Thunb. | 2339 images |
| Elatine hydropiper L. | 1 images |
| Elatine rubella Rydb. | 6 images |
| Elatine triandra Schkuhr | 38 images |
| Eleocharis acicularis (L.) Roem. & Schult. | 49 images |
| Eleocharis compressa Sull. | 16 images |
| Eleocharis erythropoda Steud. | 5 images |
| Eleocharis macrostachya Britton | 10 images |
| Eleocharis obtusa (Willd.) Schult. | 31 images |
| Eleocharis ovata (Roth) Roem. & Schult. | 42 images |
| Eleocharis palustris (L.) Roem. & Schult. | 577 images |
| Eleocharis parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer | 40 images |
| Eleocharis uniglumis (Link) Schult. | 26 images |
| Eleusine indica (L.) Gaertn. | 808 images |
| Ellisia nyctelea (L.) L. | 38 images |
| Elodea canadensis Michx. | 215 images |
| Elsholtzia ciliata (Thunb.) Hyl. | 48 images |
| Elymus canadensis L. | 116 images |
| Elymus elymoides (Raf.) Swezey | 19 images |
| Elymus glaucus Buckley | 13 images |
| Elymus hystrix L. | 35 images |
| Elymus repens (L.) Gould | 534 images |
| Elymus riparius Wiegand | 4 images |
| Elymus sibiricus L. | 1 images |
| Elymus villosus Muhl. ex Willd. | 6 images |
| Elymus virginicus L. | 40 images |
| Empetrum nigrum L. | 1096 images |
| Enemion biternatum Raf. | 1 images |
| Epigaea repens L. | 153 images |
| Epilobium anagallidifolium Lam. | 182 images |
| Epilobium ciliatum Raf. | 3969 images |
| Epilobium clavatum Trel. | 2 images |
| Epilobium coloratum Biehler | 50 images |
| Epilobium glaberrimum Barbey | 13 images |
| Epilobium hirsutum L. | 12149 images |
| Epilobium hornemannii Rchb. | 23 images |
| Epilobium lactiflorum Hausskn. | 18 images |
| Epilobium leptophyllum Raf. | 8 images |
| Epilobium luteum Pursh | 26 images |
| Epilobium minutum Lindl. ex Lehm. | 13 images |
| Epilobium mirabile Trel. ex Piper | 3 images |
| Epilobium montanum L. | 2775 images |
| Epilobium oregonense Hausskn. | 4 images |
| Epilobium palustre L. | 354 images |
| Epilobium parviflorum Schreb. | 3294 images |
| Epipactis helleborine (L.) Crantz | 5777 images |
| Equisetum arvense L. | 5676 images |
| Equisetum fluviatile L. | 725 images |
| Equisetum hyemale L. | 2454 images |
| Equisetum palustre L. | 789 images |
| Equisetum pratense Ehrh. | 303 images |
| Equisetum scirpoides Michx. | 73 images |
| Equisetum sylvaticum L. | 2054 images |
| Equisetum telmateia Ehrh. | 5373 images |
| Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. | 5 images |
| Eragrostis mexicana (Hornem.) Link | 25 images |
| Eragrostis minor Host | 259 images |
| Eragrostis spectabilis (Pursh) Steud. | 158 images |
| Eranthis hyemalis (L.) Salisb. | 4103 images |
| Erechtites hieraciifolius (L.) Raf. ex DC. | 1437 images |
| Eremopyrum triticeum (Gaertn.) Nevski | 8 images |
| Erigenia bulbosa (Michx.) Nutt. | 71 images |
| Erigeron acris L. | 848 images |
| Erigeron annuus (L.) Pers. | 5194 images |
| Erigeron aureus Greene | 11 images |
| Erigeron caespitosus Nutt. | 3 images |
| Erigeron compositus Pursh | 33 images |
| Erigeron divergens Torr. & A. Gray | 2 images |
| Erigeron glabellus Nutt. | 104 images |
| Erigeron grandiflorus Hook. | 1 images |
| Erigeron humilis Graham | 6 images |
| Erigeron linearis (Hook.) Piper | 34 images |
| Erigeron lonchophyllus Hook. | 13 images |
| Erigeron philadelphicus L. | 2757 images |
| Erigeron pulchellus Michx. | 182 images |
| Erigeron pumilus Nutt. | 59 images |
| Erigeron speciosus (Lindl.) DC. | 837 images |
| Erigeron strigosus Muhl. ex Willd. | 3851 images |
| Erigeron uniflorus L. | 421 images |
| Eriocaulon aquaticum (Hill) Druce | 23 images |
| Eriogonum cernuum Nutt. | 12 images |
| Eriogonum heracleoides Nutt. | 101 images |
| Eriogonum ovalifolium Nutt. | 149 images |
| Eriogonum pyrolifolium Hook. | 46 images |
| Eriogonum strictum Benth. | 41 images |
| Eriogonum umbellatum Torr. | 399 images |
| Eriophorum angustifolium Honck. | 2141 images |
| Eriophorum scheuchzeri Hoppe | 875 images |
| Eriophorum vaginatum L. | 763 images |
| Eriophorum virginicum L. | 16 images |
| Eriophorum viridicarinatum (Engelm.) Fernald | 2 images |
| Erodium cicutarium (L.) L'Hér. ex Aiton | 6 images |
| Eruca vesicaria (L.) Cav. | 2509 images |
| Eryngium aquaticum L. | 16 images |
| Eryngium campestre L. | 5054 images |
| Eryngium maritimum L. | 3744 images |
| Eryngium planum L. | 1867 images |
| Erysimum asperum (Nutt.) DC. | 88 images |
| Erysimum cheiranthoides L. | 1093 images |
| Erysimum cheiri (L.) Crantz | 29 images |
| Erysimum repandum L. | 51 images |
| Erythronium albidum Nutt. | 190 images |
| Erythronium americanum Ker Gawl. | 1285 images |
| Erythronium grandiflorum Pursh | 141 images |
| Erythronium oregonum Applegate | 124 images |
| Erythronium revolutum Sm. | 113 images |
| Eschscholzia californica Cham. | 13177 images |
| Euonymus alatus (Thunb.) Siebold | 2775 images |
| Euonymus atropurpureus Jacq. | 108 images |
| Euonymus europaeus L. | 18446 images |
| Euonymus fortunei (Turcz.) Hand.-Maz. | 8 images |
| Euonymus occidentalis Nutt. ex Torr. | 27 images |
| Eupatorium altissimum L. | 110 images |
| Eupatorium cannabinum L. | 19406 images |
| Eupatorium perfoliatum L. | 856 images |
| Eupatorium serotinum Michx. | 869 images |
| Euphorbia corollata L. | 194 images |
| Euphorbia cyparissias L. | 14682 images |
| Euphorbia davidii Subils | 36 images |
| Euphorbia epithymoides L. | 668 images |
| Euphorbia esula L. | 1583 images |
| Euphorbia exigua L. | 539 images |
| Euphorbia helioscopia L. | 8444 images |
| Euphorbia lathyris L. | 8437 images |
| Euphorbia lucida Waldst. & Kit. | 59 images |
| Euphorbia marginata Pursh | 1346 images |
| Euphorbia myrsinites L. | 2053 images |
| Euphorbia peplus L. | 6346 images |
| Euphorbia platyphyllos L. | 445 images |
| Euphrasia frigida Pugsley | 3 images |
| Euphrasia nemorosa (Pers.) Wallr. | 314 images |
| Eurybia divaricata (L.) G.L. Nesom | 6 images |
| Eurybia macrophylla (L.) Cass. | 1393 images |
| Eurybia schreberi (Nees) Nees | 23 images |
| Euthamia graminifolia (L.) Nutt. | 651 images |
| Euthamia gymnospermoides Greene | 13 images |
| Euthamia occidentalis Nutt. | 42 images |
| Eutrochium fistulosum (Barratt) E.E. Lamont | 2 images |
| Eutrochium maculatum (L.) E.E. Lamont | 16 images |
| Fagopyrum esculentum Moench | 5605 images |
| Fagopyrum tataricum (L.) Gaertn. | 179 images |
| Fagus grandifolia Ehrh. | 2255 images |
| Fagus sylvatica L. | 27248 images |
| Festuca filiformis Pourr. | 131 images |
| Festuca idahoensis Elmer | 3 images |
| Festuca occidentalis Hook. | 7 images |
| Festuca rubra L. | 341 images |
| Festuca viridula Vasey | 1 images |
| Festuca viviparoidea Krajina ex Pavlick | 6 images |
| Filago pyramidata L. | 455 images |
| Filago vulgaris Lam. | 5 images |
| Filipendula rubra (Hill) B.L. Rob. | 4 images |
| Filipendula ulmaria (L.) Maxim. | 11331 images |
| Filipendula vulgaris Moench | 3087 images |
| Fimbristylis autumnalis (L.) Roem. & Schult. | 287 images |
| Floerkea proserpinacoides Willd. | 43 images |
| Foeniculum vulgare Mill. | 10534 images |
| Forsythia viridissima Lindl. | 2824 images |
| Fragaria chiloensis (L.) Mill. | 347 images |
| Fragaria vesca L. | 10979 images |
| Fragaria virginiana Duchesne | 1 images |
| Frangula alnus Mill. | 5496 images |
| Frangula purshiana (DC.) A. Gray | 2 images |
| Frasera caroliniensis Walter | 46 images |
| Fraxinus americana L. | 4551 images |
| Fraxinus excelsior L. | 22654 images |
| Fraxinus latifolia Benth. | 200 images |
| Fraxinus nigra Marshall | 25 images |
| Fraxinus pennsylvanica Marshall | 717 images |
| Fraxinus profunda (Bush) Bush | 19 images |
| Fraxinus quadrangulata Michx. | 34 images |
| Fritillaria camschatcensis (L.) Ker Gawl. | 40 images |
| Fritillaria pudica (Pursh) Spreng. | 51 images |
| Froelichia gracilis (Hook.) Moq. | 33 images |
| Fuirena pumila (Torr.) Spreng. | 1 images |
| Fumaria bastardii Boreau | 1094 images |
| Fumaria officinalis L. | 7289 images |
| Gaillardia aristata Pursh | 2469 images |
| Gaillardia pulchella Foug. | 3146 images |
| Galanthus nivalis L. | 4961 images |
| Galearis spectabilis (L.) Raf. | 153 images |
| Galega officinalis L. | 2310 images |
| Galeopsis bifida Boenn. | 482 images |
| Galeopsis ladanum L. | 646 images |
| Galeopsis speciosa Mill. | 1238 images |
| Galeopsis tetrahit L. | 8565 images |
| Galinsoga parviflora Cav. | 3188 images |
| Galium aparine L. | 12189 images |
| Galium asprellum Michx. | 15 images |
| Galium boreale L. | 916 images |
| Galium circaezans Michx. | 73 images |
| Galium glaucum L. | 195 images |
| Galium labradoricum (Wiegand) Wiegand | 1 images |
| Galium mexicanum Kunth | 3 images |
| Galium mollugo L. | 9202 images |
| Galium obtusum Bigelow | 7 images |
| Galium odoratum (L.) Scop. | 6672 images |
| Galium palustre L. | 1521 images |
| Galium parisiense L. | 147 images |
| Galium pilosum Aiton | 7 images |
| Galium saxatile L. | 1292 images |
| Galium sylvaticum L. | 1239 images |
| Galium tricornutum Dandy | 265 images |
| Galium trifidum L. | 36 images |
| Galium triflorum Michx. | 184 images |
| Galium verum L. | 9709 images |
| Gamochaeta purpurea (L.) Cabrera | 44 images |
| Gaultheria hispidula (L.) Muhl. ex Bigelow | 62 images |
| Gaultheria humifusa (Graham) Rydb. | 25 images |
| Gaultheria procumbens L. | 1198 images |
| Gaultheria shallon Pursh | 853 images |
| Gayophytum humile Juss. | 10 images |
| Genista tinctoria L. | 2153 images |
| Gentiana affinis Griseb. | 34 images |
| Gentiana algida Pall. | 21 images |
| Gentiana andrewsii Griseb. | 140 images |
| Gentiana calycosa Griseb. | 136 images |
| Gentiana clausa Raf. | 32 images |
| Gentiana douglasiana Bong. | 14 images |
| Gentiana fremontii Torr. | 4 images |
| Gentiana glauca Pall. | 5 images |
| Gentiana linearis Froel. | 71 images |
| Gentiana nivalis L. | 2226 images |
| Gentiana prostrata Haenke | 7 images |
| Gentiana sceptrum Griseb. | 3 images |
| Gentianella amarella (L.) Börner | 143 images |
| Gentianella quinquefolia (L.) Small | 19 images |
| Gentianopsis crinita (Froel.) Ma | 58 images |
| Gentianopsis detonsa (Rottb.) Ma | 5 images |
| Gentianopsis virgata (Raf.) Holub | 14 images |
| Geocaulon lividum (Richardson) Fernald | 2 images |
| Geranium bicknellii Britton | 29 images |
| Geranium carolinianum L. | 1203 images |
| Geranium columbinum L. | 1132 images |
| Geranium dissectum L. | 5463 images |
| Geranium erianthum DC. | 36 images |
| Geranium maculatum L. | 1272 images |
| Geranium molle L. | 8440 images |
| Geranium oreganum Howell | 13 images |
| Geranium pratense L. | 7563 images |
| Geranium pusillum L. | 7775 images |
| Geranium richardsonii Fisch. & Trautv. | 18 images |
| Geranium robertianum L. | 21491 images |
| Geranium sanguineum L. | 8358 images |
| Geranium sylvaticum L. | 8147 images |
| Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. | 5 images |
| Geum aleppicum Jacq. | 205 images |
| Geum canadense Jacq. | 90 images |
| Geum laciniatum Murray | 448 images |
| Geum macrophyllum Willd. | 2441 images |
| Geum rivale L. | 3258 images |
| Geum triflorum Pursh | 75 images |
| Geum urbanum L. | 13751 images |
| Geum virginianum L. | 12 images |
| Gilia capitata Sims | 459 images |
| Gilia sinuata Douglas ex Benth. | 21 images |
| Gillenia trifoliata (L.) Moench | 98 images |
| Githopsis specularioides Nutt. | 3 images |
| Glaucium flavum Crantz | 4959 images |
| Glaux maritima L. | 2 images |
| Glebionis segetum (L.) Fourr. | 4633 images |
| Glechoma hederacea L. | 24547 images |
| Gleditsia triacanthos L. | 10300 images |
| Glyceria canadensis (Michx.) Trin. | 11 images |
| Glyceria leptostachya Buckley | 4 images |
| Glyceria maxima (Hartm.) Holmb. | 366 images |
| Glyceria obtusa (Muhl.) Trin. | 1 images |
| Glyceria septentrionalis Hitchc. | 2 images |
| Glyceria striata (Lam.) Hitchc. | 33 images |
| Glycine max (L.) Merr. | 2240 images |
| Glycyrrhiza lepidota Pursh | 72 images |
| Gnaphalium palustre Nutt. | 35 images |
| Gnaphalium uliginosum L. | 1050 images |
| Goodyera oblongifolia Raf. | 192 images |
| Goodyera pubescens (Willd.) R. Br. | 1 images |
| Gratiola aurea Pursh | 5 images |
| Gratiola neglecta Torr. | 18 images |
| Grindelia hirsutula Hook. & Arn. | 69 images |
| Grindelia squarrosa (Pursh) Dunal | 293 images |
| Gutierrezia sarothrae (Pursh) Britton & Rusby | 64 images |
| Gymnocarpium disjunctum (Rupr.) Ching | 3 images |
| Gymnocarpium dryopteris (L.) Newman | 639 images |
| Gymnocarpium robertianum (Hoffm.) Newman | 255 images |
| Gymnocladus dioicus (L.) K. Koch | 1 images |
| Gypsophila elegans M. Bieb. | 6 images |
| Gypsophila muralis L. | 464 images |
| Gypsophila paniculata L. | 1230 images |
| Gypsophila repens L. | 1313 images |
| Gypsophila scorzonerifolia Ser. | 3 images |
| Hackelia deflexa (Wahlenb.) Opiz | 19 images |
| Hackelia floribunda (Lehm.) I.M. Johnst. | 1 images |
| Hackelia virginiana (L.) I.M. Johnst. | 1 images |
| Halimodendron halodendron (Pall.) Voss | 18 images |
| Hamamelis virginiana L. | 2794 images |
| Harrimanella hypnoides (L.) Coville | 27 images |
| Hedeoma hispida Pursh | 2 images |
| Hedeoma pulegioides (L.) Pers. | 24 images |
| Hedera helix L. | 23537 images |
| Hedysarum alpinum L. | 8 images |
| Hedysarum boreale Nutt. | 8 images |
| Hedysarum occidentale Greene | 2 images |
| Hedysarum sulphurescens Rydb. | 4 images |
| Helenium autumnale L. | 1370 images |
| Helenium flexuosum Raf. | 65 images |
| Helianthus annuus L. | 15153 images |
| Helianthus decapetalus L. | 277 images |
| Helianthus divaricatus L. | 877 images |
| Helianthus giganteus L. | 966 images |
| Helianthus hirsutus Raf. | 76 images |
| Helianthus maximiliani Schrad. | 471 images |
| Helianthus pauciflorus Nutt. | 173 images |
| Helianthus petiolaris Nutt. | 545 images |
| Helianthus strumosus L. | 72 images |
| Helianthus tuberosus L. | 7476 images |
| Heliopsis helianthoides (L.) Sweet | 2078 images |
| Heliotropium curassavicum L. | 652 images |
| Hemerocallis fulva (L.) L. | 9800 images |
| Hemerocallis lilioasphodelus L. | 5130 images |
| Hepatica nobilis Schreb. | 1732 images |
| Heracleum mantegazzianum Sommier & Levier | 2590 images |
| Heracleum sphondylium L. | 19746 images |
| Herniaria glabra L. | 612 images |
| Hesperis matronalis L. | 7098 images |
| Heteranthera dubia (Jacq.) MacMill. | 24 images |
| Heterotheca villosa (Pursh) Shinners | 149 images |
| Heuchera americana L. | 269 images |
| Heuchera chlorantha Piper | 2 images |
| Heuchera micrantha Douglas ex Lindl. | 615 images |
| Hibiscus laevis All. | 89 images |
| Hibiscus moscheutos L. | 4648 images |
| Hibiscus trionum L. | 1028 images |
| Hieracium albiflorum Hook. | 179 images |
| Hieracium aurantiacum L. | 516 images |
| Hieracium caespitosum Dumort. | 46 images |
| Hieracium murorum L. | 3449 images |
| Hieracium paniculatum L. | 12 images |
| Hieracium pilosella L. | 82 images |
| Hieracium piloselloides Vill. | 1 images |
| Hieracium sabaudum L. | 789 images |
| Hieracium scabrum Michx. | 13 images |
| Hieracium scouleri Hook. | 15 images |
| Hieracium tridentatum Fr. | 4 images |
| Hieracium triste Willd. ex Spreng. | 17 images |
| Hieracium umbellatum L. | 1975 images |
| Hieracium venosum L. | 147 images |
| Hippophae rhamnoides L. | 3365 images |
| Hippuris vulgaris L. | 454 images |
| Holcus lanatus L. | 5142 images |
| Holcus mollis L. | 167 images |
| Holodiscus discolor (Pursh) Maxim. | 655 images |
| Holosteum umbellatum L. | 140 images |
| Honckenya peploides (L.) Ehrh. | 1185 images |
| Hordeum brachyantherum Nevski | 20 images |
| Hordeum jubatum L. | 466 images |
| Hordeum marinum Huds. | 246 images |
| Hordeum murinum L. | 6359 images |
| Hordeum pusillum Nutt. | 51 images |
| Hordeum vulgare L. | 8403 images |
| Hornungia procumbens (L.) Hayek | 98 images |
| Hosta plantaginea (Lam.) Asch. | 9079 images |
| Hottonia inflata Elliott | 4 images |
| Houstonia caerulea L. | 466 images |
| Houstonia longifolia Gaertn. | 43 images |
| Hudsonia ericoides L. | 8 images |
| Hudsonia tomentosa Nutt. | 13 images |
| Humulus japonicus Siebold & Zucc. | 30 images |
| Humulus lupulus L. | 9340 images |
| Hyacinthoides hispanica (Mill.) Rothm. | 4660 images |
| Hyacinthoides non-scripta (L.) Chouard ex Rothm. | 9761 images |
| Hydrangea arborescens L. | 4931 images |
| Hydrangea paniculata Siebold | 6225 images |
| Hydrastis canadensis L. | 135 images |
| Hydrocharis morsus-ranae L. | 417 images |
| Hydrocotyle americana L. | 49 images |
| Hydrocotyle umbellata L. | 57 images |
| Hydrophyllum appendiculatum Michx. | 135 images |
| Hydrophyllum canadense L. | 14 images |
| Hydrophyllum capitatum Douglas ex Benth. | 106 images |
| Hydrophyllum fendleri (A. Gray) A. Heller | 1 images |
| Hydrophyllum virginianum L. | 724 images |
| Hylotelephium telephioides (Michx.) H. Ohba | 2 images |
| Hylotelephium telephium (L.) H. Ohba | 5 images |
| Hymenopappus filifolius Hook. | 55 images |
| Hymenoxys richardsonii (Hook.) Cockerell | 6 images |
| Hyoscyamus albus L. | 1746 images |
| Hyoscyamus niger L. | 1241 images |
| Hypericum androsaemum L. | 6409 images |
| Hypericum ascyron L. | 32 images |
| Hypericum canadense L. | 3 images |
| Hypericum ellipticum Hook. | 8 images |
| Hypericum gentianoides (L.) Britton, Sterns & Poggenb. | 19 images |
| Hypericum kalmianum L. | 140 images |
| Hypericum maculatum Crantz | 3619 images |
| Hypericum mutilum L. | 110 images |
| Hypericum perforatum L. | 16511 images |
| Hypericum prolificum L. | 185 images |
| Hypericum pulchrum L. | 663 images |
| Hypericum punctatum Lam. | 205 images |
| Hypericum scouleri Hook. | 43 images |
| Hypericum sphaerocarpum Michx. | 8 images |
| Hypochaeris glabra L. | 2280 images |
| Hypochaeris radicata L. | 9418 images |
| Hypoxis hirsuta (L.) Coville | 278 images |
| Hyssopus officinalis L. | 2169 images |
| Iberis amara L. | 1629 images |
| Iberis umbellata L. | 1410 images |
| Ilex aquifolium L. | 15246 images |
| Ilex glabra (L.) A. Gray | 157 images |
| Ilex verticillata (L.) A. Gray | 1164 images |
| Impatiens aurella Rydb. | 4 images |
| Impatiens capensis Meerb. | 2224 images |
| Impatiens glandulifera Royle | 13723 images |
| Impatiens noli-tangere L. | 2280 images |
| Impatiens pallida Nutt. | 920 images |
| Impatiens parviflora DC. | 6092 images |
| Inula britannica L. | 784 images |
| Inula helenium L. | 2462 images |
| Ipomoea hederacea Jacq. | 493 images |
| Ipomoea lacunosa L. | 326 images |
| Ipomoea pandurata (L.) G. Mey. | 282 images |
| Ipomoea purpurea (L.) Roth | 7459 images |
| Ipomoea quamoclit L. | 672 images |
| Ipomopsis aggregata (Pursh) V.E. Grant | 86 images |
| Ipomopsis rubra (L.) Wherry | 134 images |
| Iris brevicaulis Raf. | 16 images |
| Iris ensata Thunb. | 342 images |
| Iris foetidissima L. | 3524 images |
| Iris germanica L. | 12 images |
| Iris lacustris Nutt. | 6 images |
| Iris missouriensis Nutt. | 97 images |
| Iris pallida Lam. | 2022 images |
| Iris pseudacorus L. | 8912 images |
| Iris pumila L. | 1374 images |
| Iris setosa Pall. ex Link | 33 images |
| Iris sibirica L. | 2091 images |
| Iris versicolor L. | 802 images |
| Iris virginica L. | 109 images |
| Isatis tinctoria L. | 3361 images |
| Isolepis cernua (Vahl) Roem. & Schult. | 104 images |
| Isotria medeoloides (Pursh) Raf. | 19 images |
| Iva axillaris Pursh | 6 images |
| Iva frutescens L. | 64 images |
| Jeffersonia diphylla (L.) Pers. | 109 images |
| Juglans cinerea L. | 410 images |
| Juglans nigra L. | 7278 images |
| Juglans regia L. | 17740 images |
| Juncus alpinoarticulatus Chaix | 133 images |
| Juncus arcticus Willd. | 42 images |
| Juncus articulatus L. | 671 images |
| Juncus biglumis L. | 10 images |
| Juncus bolanderi Engelm. | 2 images |
| Juncus brachycarpus Engelm. | 1 images |
| Juncus brachycephalus (Engelm.) Buchenau | 3 images |
| Juncus bufonius L. | 370 images |
| Juncus bulbosus L. | 180 images |
| Juncus castaneus Sm. | 16 images |
| Juncus compressus Jacq. | 155 images |
| Juncus covillei Piper | 2 images |
| Juncus dudleyi Wiegand | 7 images |
| Juncus effusus L. | 3305 images |
| Juncus ensifolius Wikstr. | 87 images |
| Juncus filiformis L. | 100 images |
| Juncus inflexus L. | 717 images |
| Juncus interior Wiegand | 3 images |
| Juncus lesueurii Bol. | 1 images |
| Juncus marginatus Rostk. | 4 images |
| Juncus mertensianus Bong. | 8 images |
| Juncus nodosus L. | 2 images |
| Juncus parryi Engelm. | 1 images |
| Juncus stygius L. | 10 images |
| Juncus tenuis Willd. | 520 images |
| Juncus torreyi Coville | 22 images |
| Juncus trifidus L. | 183 images |
| Juncus triglumis L. | 67 images |
| Juniperus communis L. | 8182 images |
| Juniperus horizontalis Moench | 1746 images |
| Juniperus sabina L. | 1319 images |
| Juniperus scopulorum Sarg. | 502 images |
| Juniperus virginiana L. | 4353 images |
| Justicia americana (L.) Vahl | 166 images |
| Kalmia angustifolia L. | 425 images |
| Kalmia polifolia Wangenh. | 112 images |
| Kerria japonica (L.) DC. | 7400 images |
| Kickxia elatine (L.) Dumort. | 306 images |
| Kickxia spuria (L.) Dumort. | 718 images |
| Kobresia myosuroides (Vill.) Fiori | 10 images |
| Kobresia simpliciuscula (Wahlenb.) Mack. | 10 images |
| Koeleria macrantha (Ledeb.) Schult. | 134 images |
| Koenigia islandica L. | 4 images |
| Krigia virginica (L.) Willd. | 66 images |
| Lablab purpureus (L.) Sweet | 780 images |
| Laburnum anagyroides Medik. | 5696 images |
| Lactuca biennis (Moench) Fernald | 125 images |
| Lactuca canadensis L. | 365 images |
| Lactuca floridana (L.) Gaertn. | 531 images |
| Lactuca hirsuta Muhl. ex Nutt. | 22 images |
| Lactuca saligna L. | 350 images |
| Lactuca sativa L. | 4668 images |
| Lactuca serriola L. | 12059 images |
| Lagotis minor (Willd.) Standl. | 1 images |
| Lagurus ovatus L. | 3189 images |
| Lamium album L. | 7479 images |
| Lamium amplexicaule L. | 5000 images |
| Lamium maculatum L. | 4 images |
| Lamium purpureum L. | 15853 images |
| Laportea canadensis (L.) Weddell | 1 images |
| Lappula squarrosa (Retz.) Dumort. | 207 images |
| Lapsana communis L. | 13013 images |
| Larix decidua Mill. | 5972 images |
| Larix lyallii Parl. | 33 images |
| Larix occidentalis Nutt. | 144 images |
| Lasthenia glaberrima DC. | 9 images |
| Lathyrus japonicus Willd. | 577 images |
| Lathyrus latifolius L. | 9539 images |
| Lathyrus ochroleucus Hook. | 28 images |
| Lathyrus odoratus L. | 3375 images |
| Lathyrus palustris L. | 200 images |
| Lathyrus pratensis L. | 4299 images |
| Lathyrus sativus L. | 122 images |
| Lathyrus sphaericus Retz. | 465 images |
| Lathyrus sylvestris L. | 2410 images |
| Lathyrus tuberosus L. | 2012 images |
| Lathyrus venosus Muhl. ex Willd. | 7 images |
| Lavatera thuringiaca L. | 67 images |
| Lechea minor L. | 2 images |
| Lechea mucronata Raf. | 8 images |
| Ledum glandulosum Nutt. | 1 images |
| Ledum groenlandicum Oeder | 30 images |
| Ledum palustre L. | 403 images |
| Leersia oryzoides (L.) Sw. | 238 images |
| Leersia virginica Willd. | 42 images |
| Lemna minor L. | 871 images |
| Lemna trisulca L. | 100 images |
| Lemna turionifera Landolt | 19 images |
| Lens culinaris Medik. | 565 images |
| Leontodon autumnalis L. | 2 images |
| Leontodon hispidus L. | 3137 images |
| Leonurus cardiaca L. | 3199 images |
| Leonurus sibiricus L. | 262 images |
| Lepidium heterophyllum Benth. | 238 images |
| Lepidium latifolium L. | 753 images |
| Lepidium perfoliatum L. | 39 images |
| Lepidium ruderale L. | 227 images |
| Lepidium sativum L. | 786 images |
| Lepidium virginicum L. | 1602 images |
| Leptochloa fusca (L.) Kunth | 20 images |
| Lespedeza bicolor Turcz. | 457 images |
| Lespedeza capitata Michx. | 114 images |
| Lespedeza hirta (L.) Hornem. | 73 images |
| Lespedeza thunbergii (DC.) Nakai | 247 images |
| Lespedeza violacea (L.) Pers. | 3 images |
| Lespedeza virginica (L.) Britton | 90 images |
| Leucanthemella serotina (L.) Tzvelev | 117 images |
| Leucanthemum vulgare Lam. | 10311 images |
| Leucojum aestivum L. | 2029 images |
| Leucospora multifida (Michx.) Nutt. | 31 images |
| Lewisia columbiana (Howell ex A. Gray) B.L. Rob. | 1 images |
| Lewisia pygmaea (A. Gray) B.L. Rob. | 1 images |
| Lewisia rediviva Pursh | 150 images |
| Leymus arenarius (L.) Hochst. | 992 images |
| Leymus innovatus (Beal) Pilg. | 1 images |
| Leymus mollis (Trin.) Pilg. | 6 images |
| Leymus triticoides (Buckley) Pilg. | 19 images |
| Liatris aspera Michx. | 210 images |
| Liatris cylindracea Michx. | 36 images |
| Liatris punctata Hook. | 177 images |
| Liatris spicata (L.) Willd. | 2002 images |
| Ligustrum ovalifolium Hassk. | 4412 images |
| Ligustrum vulgare L. | 18104 images |
| Lilium bulbiferum L. | 9362 images |
| Lilium canadense L. | 154 images |
| Lilium columbianum Leichtlin | 207 images |
| Lilium lancifolium Thunb. | 1648 images |
| Lilium martagon L. | 7225 images |
| Lilium michiganense Farw. | 74 images |
| Lilium philadelphicum L. | 116 images |
| Limonium carolinianum (Walter) Britton | 63 images |
| Limonium vulgare Mill. | 2490 images |
| Limosella aquatica L. | 55 images |
| Linaria dalmatica (L.) Mill. | 188 images |
| Linaria maroccana Hook. f. | 2 images |
| Linaria purpurea (L.) Mill. | 3222 images |
| Linaria repens (L.) Mill. | 3383 images |
| Linaria vulgaris Mill. | 16713 images |
| Lindera benzoin (L.) Blume | 811 images |
| Lindernia dubia (L.) Pennell | 214 images |
| Linnaea borealis L. | 610 images |
| Linum austriacum L. | 168 images |
| Linum bienne Mill. | 330 images |
| Linum catharticum L. | 629 images |
| Linum lewisii Pursh | 167 images |
| Linum medium (Planch.) Britton | 20 images |
| Linum perenne L. | 2564 images |
| Linum rigidum Pursh | 17 images |
| Linum sulcatum Riddell | 4 images |
| Linum usitatissimum L. | 5079 images |
| Linum virginianum L. | 1 images |
| Liparis loeselii (L.) Rich. | 181 images |
| Liriodendron tulipifera L. | 9285 images |
| Listera auriculata Wiegand | 1 images |
| Lithophragma glabrum Nutt. | 45 images |
| Lithophragma tenellum Nutt. | 5 images |
| Lithospermum canescens (Michx.) Lehm. | 119 images |
| Lithospermum incisum Lehm. | 128 images |
| Lithospermum latifolium Michx. | 7 images |
| Lithospermum officinale L. | 1441 images |
| Lithospermum ruderale Douglas ex Lehm. | 42 images |
| Littorella uniflora (L.) Asch. | 144 images |
| Lobelia cardinalis L. | 1790 images |
| Lobelia dortmanna L. | 150 images |
| Lobelia inflata L. | 470 images |
| Lobelia kalmii L. | 53 images |
| Lobelia siphilitica L. | 1100 images |
| Lobelia spicata Lam. | 114 images |
| Lobularia maritima (L.) Desv. | 12414 images |
| Logfia minima (Sm.) Dumort. | 177 images |
| Lolium perenne L. | 2878 images |
| Lolium remotum Schrank | 3 images |
| Lolium rigidum Gaudin | 149 images |
| Lolium temulentum L. | 29 images |
| Lomatium dissectum (Nutt.) Mathias & Constance | 7 images |
| Lonicera caerulea L. | 1558 images |
| Lonicera caprifolium L. | 2286 images |
| Lonicera chrysantha Turcz. ex Ledeb. | 4 images |
| Lonicera dioica L. | 95 images |
| Lonicera etrusca Santi | 4238 images |
| Lonicera hirsuta Eaton | 20 images |
| Lonicera involucrata (Richardson) Banks ex Spreng. | 755 images |
| Lonicera japonica Thunb. | 9436 images |
| Lonicera maackii (Rupr.) Herder | 9 images |
| Lonicera morrowii A. Gray | 61 images |
| Lonicera periclymenum L. | 6902 images |
| Lonicera reticulata Raf. | 10 images |
| Lonicera sempervirens L. | 1303 images |
| Lonicera tatarica L. | 4604 images |
| Lonicera villosa (Michx.) Schult. | 3 images |
| Lonicera xylosteum L. | 9486 images |
| Lotus corniculatus L. | 18507 images |
| Lotus pedunculatus Cav. | 3408 images |
| Lotus tenuis Waldst. & Kit. ex Willd. | 1186 images |
| Ludwigia alternifolia L. | 205 images |
| Ludwigia palustris (L.) Elliott | 275 images |
| Luetkea pectinata (Pursh) Kuntze | 52 images |
| Luina hypoleuca Benth. | 13 images |
| Lunaria annua L. | 19106 images |
| Lupinus angustifolius L. | 2974 images |
| Lupinus arboreus Sims | 616 images |
| Lupinus argenteus Pursh | 90 images |
| Lupinus bicolor Lindl. | 200 images |
| Lupinus densiflorus Benth. | 36 images |
| Lupinus lepidus Douglas ex Lindl. | 7 images |
| Lupinus nootkatensis Donn ex Sims | 136 images |
| Lupinus perennis L. | 513 images |
| Lupinus polyphyllus Lindl. | 7973 images |
| Lupinus pusillus Pursh | 10 images |
| Lupinus rivularis Douglas ex Lindl. | 1 images |
| Lupinus sericeus Pursh | 40 images |
| Luzula acuminata Raf. | 12 images |
| Luzula campestris (L.) DC. | 1803 images |
| Luzula luzuloides (Lam.) Dandy & Wilmott | 459 images |
| Luzula multiflora (Ehrh.) Lej. | 312 images |
| Luzula parviflora (Ehrh.) Desv. | 4 images |
| Luzula spicata (L.) DC. | 59 images |
| Lychnis chalcedonica L. | 665 images |
| Lychnis coronaria (L.) Desr. | 4728 images |
| Lychnis flos-cuculi L. | 5758 images |
| Lycium barbarum L. | 2658 images |
| Lycium chinense Mill. | 170 images |
| Lycopus asper Greene | 11 images |
| Lycopus europaeus L. | 5391 images |
| Lycopus uniflorus Michx. | 101 images |
| Lycopus virginicus L. | 38 images |
| Lysimachia ciliata L. | 742 images |
| Lysimachia clethroides Duby | 929 images |
| Lysimachia hybrida Michx. | 1 images |
| Lysimachia lanceolata Walter | 21 images |
| Lysimachia nummularia L. | 3898 images |
| Lysimachia punctata L. | 8171 images |
| Lysimachia quadriflora Sims | 10 images |
| Lysimachia quadrifolia L. | 173 images |
| Lysimachia terrestris (L.) Britton, Sterns & Poggenb. | 12 images |
| Lysimachia thyrsiflora L. | 310 images |
| Lysimachia vulgaris L. | 8040 images |
| Lythrum alatum Pursh | 48 images |
| Lythrum salicaria L. | 23378 images |
| Machaeranthera tanacetifolia (Kunth) Nees | 116 images |
| Maclura pomifera (Raf.) C.K. Schneid. | 1 images |
| Madia glomerata Hook. | 5 images |
| Madia sativa Molina | 76 images |
| Magnolia acuminata (L.) L. | 740 images |
| Mahonia aquifolium (Pursh) Nutt. | 1035 images |
| Mahonia nervosa (Pursh) Nutt. | 13 images |
| Mahonia repens (Lindl.) G. Don | 7 images |
| Maianthemum canadense Desf. | 956 images |
| Maianthemum racemosum (L.) Link | 1391 images |
| Maianthemum stellatum (L.) Link | 516 images |
| Maianthemum trifolium (L.) Sloboda | 17 images |
| Malaxis monophyllos (L.) Sw. | 46 images |
| Malaxis unifolia Michx. | 17 images |
| Malus baccata (L.) Borkh. | 2212 images |
| Malus coronaria (L.) Mill. | 77 images |
| Malus prunifolia (Willd.) Borkh. | 203 images |
| Malus pumila Mill. | 3411 images |
| Malva alcea L. | 11958 images |
| Malva moschata L. | 4876 images |
| Malva neglecta Wallr. | 5086 images |
| Malva parviflora L. | 2535 images |
| Malva pusilla Sm. | 1276 images |
| Malva sylvestris L. | 25399 images |
| Malva verticillata L. | 195 images |
| Marrubium vulgare L. | 4165 images |
| Marsilea quadrifolia L. | 281 images |
| Matricaria discoidea DC. | 3338 images |
| Matricaria recutita L. | 168 images |
| Matteuccia struthiopteris (L.) Todaro | 2 images |
| Matthiola longipetala (Vent.) DC. | 484 images |
| Meconella oregana Nutt. | 17 images |
| Medeola virginiana L. | 307 images |
| Medicago arabica (L.) Huds. | 3138 images |
| Medicago laciniata (L.) Mill. | 86 images |
| Medicago lupulina L. | 6392 images |
| Medicago polymorpha L. | 2513 images |
| Medicago sativa L. | 15667 images |
| Melampyrum lineare Desr. | 3 images |
| Melica altissima L. | 40 images |
| Melica geyeri Munro ex Bol. | 4 images |
| Melica harfordii Bol. | 5 images |
| Melica subulata (Griseb.) Scribn. | 2 images |
| Melilotus altissimus Thuill. | 438 images |
| Melilotus indicus (L.) All. | 2119 images |
| Melilotus officinalis (L.) Lam. | 3507 images |
| Melissa officinalis L. | 12687 images |
| Menispermum canadense L. | 212 images |
| Mentha aquatica L. | 7058 images |
| Mentha arvensis L. | 2861 images |
| Mentha pulegium L. | 2485 images |
| Mentha spicata L. | 8390 images |
| Menyanthes trifoliata L. | 1677 images |
| Menziesia ferruginea Sm. | 12 images |
| Mercurialis annua L. | 6618 images |
| Mertensia lanceolata (Pursh) DC. | 10 images |
| Mertensia longiflora Greene | 7 images |
| Mertensia maritima (L.) Gray | 341 images |
| Mertensia virginica (L.) Pers. ex Link | 815 images |
| Microsteris gracilis (Hook.) Greene | 20 images |
| Mikania scandens (L.) Willd. | 276 images |
| Milium effusum L. | 300 images |
| Mimulus alatus Aiton | 108 images |
| Mimulus floribundus Lindl. | 8 images |
| Mimulus glabratus Kunth | 20 images |
| Mimulus guttatus DC. | 740 images |
| Mimulus lewisii Pursh | 25 images |
| Mimulus ringens L. | 423 images |
| Mimulus tilingii Regel | 3 images |
| Minuartia macrocarpa (Pursh) Ostenf. | 1 images |
| Minuartia michauxii (Fenzl) Farw. | 4 images |
| Minuartia obtusiloba (Rydb.) House | 16 images |
| Mirabilis albida (Walter) Heimerl | 43 images |
| Mirabilis linearis (Pursh) Heimerl | 13 images |
| Mirabilis nyctaginea (Michx.) MacMill. | 179 images |
| Miscanthus sinensis Andersson | 3272 images |
| Misopates orontium (L.) Raf. | 1628 images |
| Mitchella repens L. | 867 images |
| Mitella caulescens Nutt. | 2 images |
| Mitella diphylla L. | 124 images |
| Mitella nuda L. | 14 images |
| Mitella ovalis Greene | 6 images |
| Mitella pentandra Hook. | 22 images |
| Mitella trifida Graham | 7 images |
| Moehringia lateriflora (L.) Fenzl | 42 images |
| Moehringia macrophylla (Hook.) Fenzl | 24 images |
| Molinia caerulea (L.) Moench | 1013 images |
| Mollugo verticillata L. | 313 images |
| Moluccella laevis L. | 262 images |
| Monarda didyma L. | 2934 images |
| Monarda fistulosa L. | 2083 images |
| Monarda media Willd. | 13 images |
| Monarda punctata L. | 341 images |
| Monardella odoratissima Benth. | 212 images |
| Moneses uniflora (L.) A. Gray | 2 images |
| Monotropa hypopitys L. | 857 images |
| Monotropa uniflora L. | 1080 images |
| Montia chamissoi (Ledeb. ex Spreng.) Greene | 4 images |
| Montia fontana L. | 261 images |
| Montia parvifolia (Moc. ex DC.) Greene | 18 images |
| Morella pensylvanica (Mirb.) Kartesz | 23 images |
| Morus alba L. | 11229 images |
| Morus rubra L. | 2427 images |
| Muhlenbergia frondosa (Poir.) Fernald | 8 images |
| Muhlenbergia glomerata (Willd.) Trin. | 1 images |
| Muhlenbergia mexicana (L.) Trin. | 5 images |
| Muscari armeniacum Leichtlin ex Baker | 2818 images |
| Muscari botryoides (L.) Mill. | 5189 images |
| Mycelis muralis (L.) Dumort. | 68 images |
| Myosotis arvensis (L.) Hill | 2473 images |
| Myosotis discolor Pers. | 718 images |
| Myosotis laxa Lehm. | 281 images |
| Myosotis macrosperma Engelm. | 85 images |
| Myosotis scorpioides L. | 5458 images |
| Myosotis stricta Link ex Roem. & Schult. | 584 images |
| Myosotis sylvatica Ehrh. | 1 images |
| Myosotis verna Nutt. | 12 images |
| Myosoton aquaticum (L.) Moench | 1160 images |
| Myosurus minimus L. | 163 images |
| Myrica gale L. | 639 images |
| Myriophyllum alterniflorum DC. | 43 images |
| Myriophyllum aquaticum (Vell.) Verdc. | 556 images |
| Myriophyllum heterophyllum Michx. | 9 images |
| Myriophyllum quitense Kunth | 12 images |
| Myriophyllum sibiricum Kom. | 7 images |
| Myriophyllum spicatum L. | 281 images |
| Myriophyllum verticillatum L. | 66 images |
| Myrrhis odorata (L.) Scop. | 1380 images |
| Najas guadalupensis (Spreng.) Magnus | 14 images |
| Najas marina L. | 114 images |
| Najas minor All. | 22 images |
| Narcissus poeticus L. | 2704 images |
| Narcissus pseudonarcissus L. | 9337 images |
| Nardus stricta L. | 326 images |
| Nasturtium officinale W.T. Aiton | 1 images |
| Navarretia intertexta (Benth.) Hook. | 26 images |
| Navarretia leucocephala Benth. | 28 images |
| Navarretia squarrosa (Eschsch.) Hook. & Arn. | 4 images |
| Nelumbo lutea Willd. | 15 images |
| Nemophila parviflora Douglas ex Benth. | 13 images |
| Nemophila pedunculata Douglas ex Benth. | 5 images |
| Neobeckia aquatica (Eaton) Greene | 1 images |
| Nepeta cataria L. | 3501 images |
| Nephrophyllidium crista-galli (Menzies ex Hook.) Gilg | 12 images |
| Neslia paniculata (L.) Desv. | 77 images |
| Nicandra physalodes (L.) Scop. | 42 images |
| Nicotiana alata Link & Otto | 1108 images |
| Nicotiana longiflora Cav. | 74 images |
| Nicotiana rustica L. | 333 images |
| Nicotiana tabacum L. | 2723 images |
| Nigella damascena L. | 12501 images |
| Nonea vesicaria (L.) Rchb. | 158 images |
| Nothocalais cuspidata (Pursh) Greene | 13 images |
| Nothochelone nemorosa (Douglas ex Lindl.) Straw | 35 images |
| Nuphar lutea (L.) Sm. | 1535 images |
| Nymphaea alba L. | 3661 images |
| Nymphaea mexicana Zucc. | 167 images |
| Nymphaea odorata Aiton | 401 images |
| Nymphaea tetragona Georgi | 52 images |
| Nyssa sylvatica Marshall | 923 images |
| Oclemena acuminata (Michx.) Greene | 310 images |
| Odontites vernus (Bellardi) Dumort. | 1748 images |
| Oenothera biennis L. | 14077 images |
| Oenothera fruticosa L. | 1491 images |
| Oenothera glazioviana Micheli | 7319 images |
| Oenothera laciniata Hill | 520 images |
| Oenothera pallida Lindl. | 28 images |
| Oenothera parviflora L. | 1131 images |
| Oenothera perennis L. | 5 images |
| Oenothera pilosella Raf. | 30 images |
| Oenothera villosa Thunb. | 70 images |
| Omalotheca supina (L.) DC. | 22 images |
| Omphalodes linifolia (L.) Moench | 119 images |
| Omphalodes verna Moench | 1574 images |
| Onobrychis viciifolia Scop. | 7006 images |
| Onoclea sensibilis L. | 1531 images |
| Ononis arvensis L. | 125 images |
| Onopordum acanthium L. | 4753 images |
| Ophioglossum pusillum Raf. | 4 images |
| Oplopanax horridus (Sm.) Miq. | 233 images |
| Opuntia fragilis (Nutt.) Haw. | 162 images |
| Opuntia humifusa (Raf.) Raf. | 1106 images |
| Opuntia polyacantha Haw. | 453 images |
| Origanum vulgare L. | 19028 images |
| Ornithogalum nutans L. | 1195 images |
| Ornithogalum umbellatum L. | 8252 images |
| Orobanche californica Cham. & Schltdl. | 2 images |
| Orobanche fasciculata Nutt. | 135 images |
| Orobanche ludoviciana Nutt. | 8 images |
| Orobanche pinorum Geyer ex Hook. | 3 images |
| Orobanche uniflora L. | 111 images |
| Orthilia secunda (L.) House | 458 images |
| Orthocarpus bracteosus Benth. | 5 images |
| Orthocarpus luteus Nutt. | 4 images |
| Orthocarpus tenuifolius (Pursh) Benth. | 6 images |
| Osmorhiza berteroi DC. | 4 images |
| Osmorhiza depauperata Phil. | 4 images |
| Osmorhiza longistylis (Torr.) DC. | 325 images |
| Osmunda cinnamomea L. | 121 images |
| Osmunda claytoniana L. | 390 images |
| Osmunda regalis L. | 2241 images |
| Ostrya virginiana (Mill.) K. Koch | 1 images |
| Oxalis corniculata L. | 8832 images |
| Oxalis dillenii Jacq. | 2308 images |
| Oxalis montana Raf. | 56 images |
| Oxalis oregana Nutt. | 386 images |
| Oxalis stricta L. | 1672 images |
| Oxypolis rigidior (L.) Raf. | 22 images |
| Oxyria digyna (L.) Hill | 394 images |
| Oxytropis campestris (L.) DC. | 520 images |
| Oxytropis deflexa (Pall.) DC. | 14 images |
| Oxytropis lambertii Pursh | 48 images |
| Pachysandra terminalis Siebold & Zucc. | 1546 images |
| Packera glabella (Poir.) C. Jeffrey | 2 images |
| Paeonia lactiflora Pall. | 3080 images |
| Paeonia officinalis L. | 11088 images |
| Panax quinquefolius L. | 88 images |
| Panax trifolius L. | 133 images |
| Panicum capillare L. | 657 images |
| Panicum dichotomiflorum Michx. | 80 images |
| Panicum miliaceum L. | 1198 images |
| Panicum virgatum L. | 926 images |
| Papaver argemone L. | 1245 images |
| Papaver dubium L. | 3434 images |
| Papaver lapponicum (Tolm.) Nordh. | 5 images |
| Papaver nudicaule L. | 369 images |
| Papaver orientale L. | 4183 images |
| Papaver radicatum Rottb. | 33 images |
| Papaver rhoeas L. | 11851 images |
| Papaver somniferum L. | 9913 images |
| Parentucellia viscosa (L.) Caruel | 867 images |
| Parietaria pensylvanica Muhl. ex Willd. | 169 images |
| Parnassia glauca Raf. | 35 images |
| Parnassia palustris L. | 4202 images |
| Paronychia fastigiata (Raf.) Fernald | 7 images |
| Paronychia sessiliflora Nutt. | 3 images |
| Parthenocissus quinquefolia (L.) Planch. | 11875 images |
| Parthenocissus tricuspidata (Siebold & Zucc.) Planch. | 3779 images |
| Paspalum setaceum Michx. | 8 images |
| Pastinaca sativa L. | 6166 images |
| Paxistima myrsinites (Pursh) Raf. | 84 images |
| Pedicularis bracteosa Benth. | 47 images |
| Pedicularis canadensis L. | 194 images |
| Pedicularis contorta Benth. | 23 images |
| Pedicularis flammea L. | 6 images |
| Pedicularis groenlandica Retz. | 125 images |
| Pedicularis lanceolata Michx. | 22 images |
| Pedicularis lapponica L. | 57 images |
| Pedicularis palustris L. | 478 images |
| Pedicularis racemosa Douglas ex Benth. | 42 images |
| Pedicularis sudetica Willd. | 6 images |
| Pedicularis sylvatica L. | 793 images |
| Pedicularis verticillata L. | 948 images |
| Pellaea atropurpurea (L.) Link | 45 images |
| Peltandra virginica (L.) Schott | 141 images |
| Penstemon albertinus Greene | 19 images |
| Penstemon albidus Nutt. | 10 images |
| Penstemon davidsonii Greene | 92 images |
| Penstemon digitalis Nutt. ex Sims | 1065 images |
| Penstemon fruticosus (Pursh) Greene | 49 images |
| Penstemon gracilis Nutt. | 19 images |
| Penstemon hirsutus (L.) Willd. | 138 images |
| Penstemon nitidus Douglas ex Benth. | 16 images |
| Penstemon pallidus Small | 31 images |
| Penstemon procerus Douglas ex Graham | 63 images |
| Penstemon richardsonii Douglas ex Lindl. | 8 images |
| Penstemon serrulatus Menzies ex Sm. | 39 images |
| Penthorum sedoides L. | 44 images |
| Perideridia gairdneri (Hook. & Arn.) Mathias | 2 images |
| Perilla frutescens (L.) Britton | 2400 images |
| Petasites frigidus (L.) Fr. | 229 images |
| Petasites japonicus (Siebold & Zucc.) Maxim. | 761 images |
| Petrorhagia saxifraga (L.) Link | 1662 images |
| Petroselinum crispum (Mill.) Nyman ex A.W. Hill | 2 images |
| Phacelia campanularia A. Gray | 246 images |
| Phacelia hastata Douglas ex Lehm. | 88 images |
| Phacelia leptosepala Rydb. | 4 images |
| Phacelia linearis (Pursh) Holz. | 57 images |
| Phacelia purshii Buckley | 109 images |
| Phacelia ramosissima Douglas ex Lehm. | 85 images |
| Phacelia tanacetifolia Benth. | 15370 images |
| Phacelia thermalis Greene | 1 images |
| Phalaris arundinacea L. | 2755 images |
| Phalaris canariensis L. | 449 images |
| Phalaris minor Retz. | 166 images |
| Phedimus aizoon (L.) 't Hart | 958 images |
| Phedimus hybridus (L.) 't Hart | 71 images |
| Phedimus spurius (M. Bieb.) 't Hart | 7 images |
| Phegopteris connectilis (Michx.) Watt | 684 images |
| Phellodendron amurense Rupr. | 290 images |
| Philadelphus coronarius L. | 18526 images |
| Philadelphus inodorus L. | 132 images |
| Philadelphus lewisii Pursh | 618 images |
| Philadelphus pubescens Loisel. | 519 images |
| Phleum alpinum L. | 298 images |
| Phleum pratense L. | 2477 images |
| Phlox caespitosa Nutt. | 24 images |
| Phlox diffusa Benth. | 184 images |
| Phlox divaricata L. | 934 images |
| Phlox drummondii Hook. | 1391 images |
| Phlox hoodii Richardson | 69 images |
| Phlox longifolia Nutt. | 100 images |
| Phlox maculata L. | 1495 images |
| Phlox paniculata L. | 5901 images |
| Phlox pilosa L. | 169 images |
| Phlox speciosa Pursh | 82 images |
| Phlox stolonifera Sims | 52 images |
| Phlox subulata L. | 4628 images |
| Phragmites australis (Cav.) Trin. ex Steud. | 6345 images |
| Phryma leptostachya L. | 155 images |
| Phyla lanceolata (Michx.) Greene | 121 images |
| Phyllodoce caerulea (L.) Bab. | 163 images |
| Phyllodoce empetriformis (Sm.) D. Don | 82 images |
| Phyllodoce glanduliflora (Hook.) Coville | 19 images |
| Phyllospadix scouleri Hook. | 21 images |
| Physalis alkekengi L. | 3686 images |
| Physalis heterophylla Nees | 122 images |
| Physalis longifolia Nutt. | 219 images |
| Physalis peruviana L. | 3349 images |
| Physalis philadelphica Lam. | 653 images |
| Physalis pubescens L. | 160 images |
| Physalis virginiana Mill. | 2 images |
| Physocarpus capitatus (Pursh) Kuntze | 438 images |
| Physocarpus malvaceus (Greene) Kuntze | 5 images |
| Physocarpus opulifolius (L.) Maxim. | 4330 images |
| Physostegia virginiana (L.) Benth. | 1974 images |
| Phytolacca americana L. | 18247 images |
| Picea abies (L.) Karst. | 1 images |
| Picea engelmannii Parry ex Engelm. | 185 images |
| Picea glauca (Moench) Voss | 1508 images |
| Picea mariana (Mill.) Britton, Sterns & Poggenb. | 63 images |
| Picea pungens Engelm. | 5245 images |
| Picea rubens Sarg. | 1861 images |
| Picea sitchensis (Bong.) Carrière | 960 images |
| Picris echioides L. | 73 images |
| Picris hieracioides L. | 4260 images |
| Pilea fontana (Lunell) Rydb. | 1 images |
| Pilea pumila (L.) A. Gray | 1 images |
| Pimpinella saxifraga L. | 1778 images |
| Pinguicula villosa L. | 3 images |
| Pinguicula vulgaris L. | 1164 images |
| Pinus albicaulis Engelm. | 117 images |
| Pinus banksiana Lamb. | 375 images |
| Pinus contorta Douglas ex Loudon | 536 images |
| Pinus mugo Turra | 4161 images |
| Pinus nigra Arnold | 2849 images |
| Pinus ponderosa Lawson & C. Lawson | 3 images |
| Pinus resinosa Aiton | 1335 images |
| Pinus rigida Mill. | 392 images |
| Pinus strobus L. | 4108 images |
| Pinus sylvestris L. | 9946 images |
| Pinus virginiana Mill. | 109 images |
| Pisum sativum L. | 4321 images |
| Plantago arenaria Waldst. & Kit. | 197 images |
| Plantago aristata Michx. | 25 images |
| Plantago cordata Lam. | 13 images |
| Plantago coronopus L. | 2418 images |
| Plantago elongata Pursh | 15 images |
| Plantago eriopoda Torr. | 12 images |
| Plantago lanceolata L. | 13410 images |
| Plantago major L. | 9854 images |
| Plantago maritima L. | 777 images |
| Plantago media L. | 4514 images |
| Plantago patagonica Jacq. | 42 images |
| Plantago rugelii Decne. | 176 images |
| Plantago virginica L. | 162 images |
| Platanthera aquilonis Sheviak | 21 images |
| Platanthera blephariglottis (Willd.) Lindl. | 36 images |
| Platanthera ciliaris (L.) Lindl. | 78 images |
| Platanthera clavellata (Michx.) Luer | 43 images |
| Platanthera flava (L.) Lindl. | 17 images |
| Platanthera grandiflora (Bigelow) Lindl. | 11 images |
| Platanthera leucophaea (Nutt.) Lindl. | 11 images |
| Platanthera obtusata (Banks ex Pursh) Lindl. | 12 images |
| Platanthera orbiculata (Pursh) Lindl. | 44 images |
| Platanthera psycodes (L.) Lindl. | 84 images |
| Platanthera stricta Lindl. | 22 images |
| Platanus occidentalis L. | 7780 images |
| Plectritis congesta (Lindl.) DC. | 7 images |
| Pluchea odorata (L.) Cass. | 260 images |
| Poa alpina L. | 305 images |
| Poa annua L. | 2786 images |
| Poa arida Vasey | 2 images |
| Poa autumnalis Muhl. ex Elliott | 1 images |
| Poa bolanderi Vasey | 10 images |
| Poa chaixii Vill. | 103 images |
| Poa compressa L. | 110 images |
| Poa confinis Vasey | 2 images |
| Poa cusickii Vasey | 7 images |
| Poa fendleriana (Steud.) Vasey | 10 images |
| Poa glauca Vahl | 40 images |
| Poa infirma Kunth | 50 images |
| Poa laxa Haenke | 14 images |
| Poa laxiflora Buckley | 2 images |
| Poa leptocoma Trin. | 9 images |
| Poa macrantha Vasey | 1 images |
| Poa marcida Hitchc. | 1 images |
| Poa nemoralis L. | 376 images |
| Poa nervosa (Hook.) Vasey | 3 images |
| Poa palustris L. | 122 images |
| Poa pratensis L. | 2603 images |
| Poa stenantha Trin. | 1 images |
| Poa trivialis L. | 1646 images |
| Podophyllum peltatum L. | 1774 images |
| Podostemum ceratophyllum Michx. | 3 images |
| Pogonia ophioglossoides (L.) Ker Gawl. | 102 images |
| Polanisia dodecandra (L.) DC. | 119 images |
| Polemonium caeruleum L. | 1285 images |
| Polemonium elegans Greene | 20 images |
| Polemonium micranthum Benth. | 4 images |
| Polemonium occidentale Greene | 103 images |
| Polemonium pulcherrimum Hook. | 84 images |
| Polemonium reptans L. | 387 images |
| Polemonium vanbruntiae Britton | 1 images |
| Polemonium viscosum Nutt. | 25 images |
| Polycarpon tetraphyllum (L.) L. | 1146 images |
| Polycnemum arvense L. | 19 images |
| Polygala alba Nutt. | 26 images |
| Polygala cruciata L. | 9 images |
| Polygala paucifolia Willd. | 162 images |
| Polygala polygama Walter | 27 images |
| Polygala sanguinea L. | 60 images |
| Polygala senega L. | 26 images |
| Polygala verticillata L. | 5 images |
| Polygonatum biflorum (Walter) Elliott | 643 images |
| Polygonatum pubescens (Willd.) Pursh | 142 images |
| Polygonum aviculare L. | 4978 images |
| Polygonum bellardii All. | 27 images |
| Polygonum bistorta L. | 18 images |
| Polygonum cilinode Michx. | 3 images |
| Polygonum convolvulus L. | 7 images |
| Polygonum douglasii Greene | 5 images |
| Polygonum hydropiperoides Michx. | 13 images |
| Polygonum lapathifolium L. | 199 images |
| Polygonum orientale L. | 2 images |
| Polygonum pensylvanicum L. | 32 images |
| Polygonum persicaria L. | 1079 images |
| Polygonum punctatum Elliott | 9 images |
| Polygonum raii Bab. | 83 images |
| Polygonum tenue Michx. | 3 images |
| Polygonum virginianum L. | 101 images |
| Polygonum viviparum L. | 1 images |
| Polymnia canadensis L. | 132 images |
| Polypodium amorphum Suksd. | 9 images |
| Polypodium glycyrrhiza D.C. Eaton | 18 images |
| Polypodium hesperium Maxon | 10 images |
| Polypodium scouleri Hook. & Grev. | 26 images |
| Polypodium virginianum L. | 274 images |
| Polypogon monspeliensis (L.) Desf. | 772 images |
| Polypogon viridis (Gouan) Breistr. | 193 images |
| Polystichum acrostichoides (Michx.) Schott | 574 images |
| Polystichum andersonii Hopkins | 2 images |
| Polystichum lemmonii Underw. | 20 images |
| Polystichum lonchitis (L.) Roth | 596 images |
| Pontederia cordata L. | 1439 images |
| Populus alba L. | 11591 images |
| Populus balsamifera L. | 1426 images |
| Populus deltoides W. Bartram ex Marshall | 3 images |
| Populus grandidentata Michx. | 292 images |
| Populus heterophylla L. | 23 images |
| Populus nigra L. | 13640 images |
| Populus tremuloides Michx. | 1314 images |
| Portulaca grandiflora Hook. | 7682 images |
| Portulaca oleracea L. | 12208 images |
| Potamogeton amplifolius Tuck. | 7 images |
| Potamogeton crispus L. | 151 images |
| Potamogeton epihydrus Raf. | 4 images |
| Potamogeton foliosus Raf. | 5 images |
| Potamogeton friesii Rupr. | 8 images |
| Potamogeton gramineus L. | 39 images |
| Potamogeton natans L. | 534 images |
| Potamogeton nodosus Poir. | 299 images |
| Potamogeton perfoliatus L. | 149 images |
| Potamogeton praelongus Wulfen | 22 images |
| Potamogeton pusillus L. | 41 images |
| Potentilla argentea L. | 2305 images |
| Potentilla arguta Pursh | 3 images |
| Potentilla biennis Greene | 2 images |
| Potentilla canadensis L. | 79 images |
| Potentilla concinna Richardson | 8 images |
| Potentilla drummondii Lehm. | 17 images |
| Potentilla erecta (L.) Raeusch. | 4362 images |
| Potentilla gracilis Douglas ex Hook. | 176 images |
| Potentilla hippiana Lehm. | 9 images |
| Potentilla inclinata Vill. | 44 images |
| Potentilla intermedia L. | 93 images |
| Potentilla neumanniana Rchb. | 94 images |
| Potentilla nivea L. | 26 images |
| Potentilla norvegica L. | 651 images |
| Potentilla pensylvanica L. | 16 images |
| Potentilla plattensis Nutt. | 1 images |
| Potentilla recta L. | 3144 images |
| Potentilla reptans L. | 10064 images |
| Potentilla simplex Michx. | 428 images |
| Potentilla sterilis (L.) Garcke | 1415 images |
| Prenanthes alba L. | 57 images |
| Primula cuneifolia Ledeb. | 3 images |
| Primula laurentiana Fernald | 32 images |
| Primula mistassinica Michx. | 4 images |
| Primula nutans Georgi | 6 images |
| Primula veris L. | 13122 images |
| Proboscidea louisianica (Mill.) Thell. | 217 images |
| Prosartes hookeri Torr. | 118 images |
| Prosartes smithii (Hook.) Utech, Shinwari & Kawano | 57 images |
| Prosartes trachycarpa S. Watson | 1 images |
| Proserpinaca palustris L. | 4 images |
| Proserpinaca pectinata Lam. | 2 images |
| Prunella vulgaris L. | 18528 images |
| Prunus americana Marshall | 45 images |
| Prunus avium (L.) L. | 19626 images |
| Prunus cerasifera Ehrh. | 21227 images |
| Prunus cerasus L. | 9687 images |
| Prunus domestica L. | 16585 images |
| Prunus glandulosa Thunb. | 266 images |
| Prunus laurocerasus L. | 19727 images |
| Prunus mahaleb L. | 6451 images |
| Prunus nigra Aiton | 2 images |
| Prunus padus L. | 12980 images |
| Prunus pensylvanica L. f. | 4 images |
| Prunus persica (L.) Batsch | 9932 images |
| Prunus pumila L. | 16 images |
| Prunus serotina Ehrh. | 7939 images |
| Prunus spinosa L. | 30807 images |
| Prunus tomentosa Thunb. | 339 images |
| Prunus virginiana L. | 2440 images |
| Pseudognaphalium stramineum (Kunth) Anderb. | 101 images |
| Pseudotsuga menziesii (Mirb.) Franco | 4232 images |
| Psilocarphus brevissimus Nutt. | 36 images |
| Psilocarphus tenellus Nutt. | 30 images |
| Ptelea trifoliata L. | 417 images |
| Pteridium aquilinum (L.) Kuhn | 6362 images |
| Pterospora andromedea Nutt. | 245 images |
| Puccinellia distans (Jacq.) Parl. | 89 images |
| Puccinellia maritima (Huds.) Parl. | 57 images |
| Pulmonaria officinalis L. | 3729 images |
| Pulmonaria saccharata Mill. | 2210 images |
| Pulsatilla patens (L.) Mill. | 19 images |
| Purshia tridentata (Pursh) DC. | 166 images |
| Pycnanthemum incanum (L.) Michx. | 110 images |
| Pycnanthemum tenuifolium Schrad. | 242 images |
| Pycnanthemum verticillatum (Michx.) Pers. | 73 images |
| Pyracantha coccinea M. Roem. | 3 images |
| Pyrola asarifolia Michx. | 104 images |
| Pyrola chlorantha Sw. | 308 images |
| Pyrola elliptica Nutt. | 138 images |
| Pyrola minor L. | 587 images |
| Pyrola picta Sm. | 122 images |
| Pyrrocoma carthamoides Hook. | 4 images |
| Pyrrocoma lanceolata (Hook.) Greene | 1 images |
| Pyrrocoma uniflora (Hook.) Greene | 13 images |
| Pyrus communis L. | 10108 images |
| Quercus alba L. | 663 images |
| Quercus bicolor Willd. | 556 images |
| Quercus garryana Douglas ex Hook. | 164 images |
| Quercus ilicifolia Wangenh. | 39 images |
| Quercus macrocarpa Michx. | 1226 images |
| Quercus muehlenbergii Engelm. | 48 images |
| Quercus palustris Münchh. | 3655 images |
| Quercus robur L. | 16585 images |
| Quercus rubra L. | 11112 images |
| Quercus shumardii Buckley | 58 images |
| Quercus velutina Lam. | 1045 images |
| Radiola linoides Roth | 131 images |
| Ranunculus abortivus L. | 449 images |
| Ranunculus acris L. | 11385 images |
| Ranunculus alismifolius Geyer ex Benth. | 55 images |
| Ranunculus aquatilis L. | 544 images |
| Ranunculus bulbosus L. | 4755 images |
| Ranunculus californicus Benth. | 181 images |
| Ranunculus cymbalaria Pursh | 10 images |
| Ranunculus eschscholtzii Schltdl. | 24 images |
| Ranunculus fascicularis Muhl. ex Bigelow | 63 images |
| Ranunculus ficaria L. | 4938 images |
| Ranunculus flabellaris Raf. | 10 images |
| Ranunculus flammula L. | 1736 images |
| Ranunculus glaberrimus Hook. | 68 images |
| Ranunculus gmelinii DC. | 4 images |
| Ranunculus hederaceus L. | 156 images |
| Ranunculus hispidus Michx. | 190 images |
| Ranunculus hyperboreus Rottb. | 14 images |
| Ranunculus inamoenus Greene | 3 images |
| Ranunculus macounii Britton | 11 images |
| Ranunculus occidentalis Nutt. | 64 images |
| Ranunculus orthorhynchus Hook. | 43 images |
| Ranunculus parviflorus L. | 607 images |
| Ranunculus pensylvanicus L. f. | 2 images |
| Ranunculus pygmaeus Wahlenb. | 16 images |
| Ranunculus recurvatus Poir. | 202 images |
| Ranunculus repens L. | 14601 images |
| Ranunculus sardous Crantz | 787 images |
| Ranunculus sceleratus L. | 1366 images |
| Ranunculus trichophyllus Chaix | 460 images |
| Raphanus raphanistrum L. | 13146 images |
| Raphanus sativus L. | 34 images |
| Rapistrum rugosum (L.) All. | 2851 images |
| Ratibida columnifera (Nutt.) Wooton & Standl. | 412 images |
| Ratibida pinnata (Vent.) Barnhart | 315 images |
| Reseda alba L. | 1897 images |
| Reseda lutea L. | 5671 images |
| Reseda luteola L. | 2921 images |
| Reseda odorata L. | 74 images |
| Rhamnus cathartica L. | 5108 images |
| Rhamnus davurica Pall. | 1 images |
| Rheum rhabarbarum L. | 570 images |
| Rhexia virginica L. | 108 images |
| Rhinanthus minor L. | 2607 images |
| Rhodiola integrifolia Raf. | 76 images |
| Rhodiola rosea L. | 740 images |
| Rhododendron albiflorum Hook. | 34 images |
| Rhododendron canadense (L.) Torr. | 107 images |
| Rhododendron lapponicum (L.) Wahlenb. | 261 images |
| Rhododendron maximum L. | 6092 images |
| Rhus aromatica Aiton | 613 images |
| Rhus copallinum L. | 886 images |
| Rhus glabra L. | 1709 images |
| Rhus trilobata Nutt. | 10 images |
| Rhus typhina L. | 10072 images |
| Rhynchospora alba (L.) Vahl | 180 images |
| Rhynchospora capitellata (Michx.) Vahl | 3 images |
| Ribes acerifolium Howell | 2 images |
| Ribes americanum Mill. | 97 images |
| Ribes aureum Pursh | 1579 images |
| Ribes cereum Douglas | 142 images |
| Ribes cynosbati L. | 235 images |
| Ribes divaricatum Douglas | 27 images |
| Ribes hirtellum Michx. | 5 images |
| Ribes hudsonianum Richardson | 5 images |
| Ribes inerme Rydb. | 24 images |
| Ribes lacustre (Pers.) Poir. | 81 images |
| Ribes laxiflorum Pursh | 10 images |
| Ribes missouriense Nutt. | 58 images |
| Ribes montigenum McClatchie | 30 images |
| Ribes nigrum L. | 2754 images |
| Ribes oxyacanthoides L. | 2 images |
| Ribes rubrum L. | 5299 images |
| Ribes sanguineum Pursh | 6122 images |
| Ribes triste Pall. | 9 images |
| Ribes uva-crispa L. | 3091 images |
| Ribes viscosissimum Pursh | 24 images |
| Robinia hispida L. | 1262 images |
| Robinia pseudoacacia L. | 21155 images |
| Robinia viscosa Vent. | 43 images |
| Romanzoffia tracyi Jeps. | 1 images |
| Rorippa amphibia (L.) Besser | 1318 images |
| Rorippa austriaca (Crantz) Besser | 142 images |
| Rorippa curvipes Greene | 10 images |
| Rorippa palustris (L.) Besser | 944 images |
| Rorippa sylvestris (L.) Besser | 2089 images |
| Rosa acicularis Lindl. | 24 images |
| Rosa arkansana Porter | 89 images |
| Rosa blanda Aiton | 23 images |
| Rosa canina L. | 21053 images |
| Rosa carolina L. | 28 images |
| Rosa centifolia L. | 43 images |
| Rosa cinnamomea L. | 2160 images |
| Rosa gallica L. | 10398 images |
| Rosa gymnocarpa Nutt. | 6 images |
| Rosa micrantha Borrer ex Sm. | 616 images |
| Rosa multiflora Thunb. | 4838 images |
| Rosa palustris Marshall | 43 images |
| Rosa rubiginosa L. | 3717 images |
| Rosa rugosa Thunb. | 8848 images |
| Rosa setigera Michx. | 261 images |
| Rosa spinosissima L. | 3993 images |
| Rosa tomentosa Sm. | 224 images |
| Rosa virginiana Mill. | 136 images |
| Rosa woodsii Lindl. | 807 images |
| Rosa xanthina Lindl. | 637 images |
| Rotala ramosior (L.) Koehne | 9 images |
| Rubus allegheniensis Porter | 65 images |
| Rubus arcticus L. | 84 images |
| Rubus armeniacus Focke | 1040 images |
| Rubus caesius L. | 6598 images |
| Rubus canadensis L. | 182 images |
| Rubus chamaemorus L. | 317 images |
| Rubus flagellaris Willd. | 30 images |
| Rubus hispidus L. | 84 images |
| Rubus idaeus L. | 6974 images |
| Rubus illecebrosus Focke | 52 images |
| Rubus nivalis Douglas ex Hook. | 14 images |
| Rubus occidentalis L. | 2855 images |
| Rubus odoratus L. | 1434 images |
| Rubus parviflorus Nutt. | 551 images |
| Rubus pedatus Sm. | 36 images |
| Rubus pensilvanicus Poir. | 39 images |
| Rubus pubescens Raf. | 104 images |
| Rubus setosus Bigelow | 4 images |
| Rubus spectabilis Pursh | 1091 images |
| Rubus ursinus Cham. & Schltdl. | 149 images |
| Rudbeckia fulgida Aiton | 6834 images |
| Rudbeckia hirta L. | 4532 images |
| Rudbeckia laciniata L. | 2366 images |
| Rudbeckia triloba L. | 1044 images |
| Rumex acetosa L. | 6308 images |
| Rumex acetosella L. | 4891 images |
| Rumex alpinus L. | 1471 images |
| Rumex aquaticus L. | 341 images |
| Rumex confertus Willd. | 60 images |
| Rumex conglomeratus Murray | 2224 images |
| Rumex crispus L. | 9640 images |
| Rumex dentatus L. | 15 images |
| Rumex longifolius DC. | 1015 images |
| Rumex maritimus L. | 87 images |
| Rumex obtusifolius L. | 12549 images |
| Rumex patientia L. | 2764 images |
| Rumex paucifolius Nutt. | 11 images |
| Rumex salicifolius Weinm. | 29 images |
| Rumex sanguineus L. | 1360 images |
| Rumex stenophyllus Ledeb. | 1 images |
| Rumex venosus Pursh | 12 images |
| Rumex verticillatus L. | 24 images |
| Ruppia cirrhosa (Petagna) Grande | 33 images |
| Ruppia maritima L. | 23 images |
| Ruta graveolens L. | 3136 images |
| Sabatia angularis (L.) Pursh | 160 images |
| Sagina apetala Ard. | 191 images |
| Sagina japonica (Sw.) Ohwi | 4 images |
| Sagina nodosa (L.) Fenzl | 119 images |
| Sagina procumbens L. | 902 images |
| Sagittaria graminea Michx. | 61 images |
| Sagittaria latifolia Willd. | 694 images |
| Sagittaria rigida Pursh | 8 images |
| Salicornia depressa Standl. | 4 images |
| Salix alba L. | 9809 images |
| Salix amygdaloides Andersson | 24 images |
| Salix arctica Pall. | 19 images |
| Salix atrocinerea Brot. | 3511 images |
| Salix barrattiana Hook. | 4 images |
| Salix bebbiana Sarg. | 28 images |
| Salix boothii Dorn | 1 images |
| Salix brachycarpa Nutt. | 1 images |
| Salix caprea L. | 11965 images |
| Salix cascadensis Cockerell | 1 images |
| Salix cinerea L. | 5553 images |
| Salix commutata Bebb | 11 images |
| Salix daphnoides Vill. | 120 images |
| Salix discolor Muhl. | 445 images |
| Salix drummondiana Barratt ex Hook. | 2 images |
| Salix eriocephala Michx. | 69 images |
| Salix exigua Nutt. | 225 images |
| Salix fragilis L. | 28 images |
| Salix geyeriana Andersson | 5 images |
| Salix glauca L. | 203 images |
| Salix hastata L. | 1556 images |
| Salix herbacea L. | 317 images |
| Salix hookeriana Barratt ex Hook. | 15 images |
| Salix humilis Marshall | 14 images |
| Salix interior Rowlee | 5 images |
| Salix lemmonii Bebb | 2 images |
| Salix lucida Muhl. | 61 images |
| Salix lutea Nutt. | 2 images |
| Salix melanopsis Nutt. | 8 images |
| Salix myricoides Muhl. | 1 images |
| Salix myrsinifolia Salisb. | 667 images |
| Salix nigra Marshall | 106 images |
| Salix nivalis Hook. | 9 images |
| Salix pentandra L. | 1023 images |
| Salix petrophila Rydb. | 32 images |
| Salix planifolia Pursh | 7 images |
| Salix polaris Wahlenb. | 11 images |
| Salix prolixa Andersson | 13 images |
| Salix purpurea L. | 2983 images |
| Salix pyrifolia Andersson | 2 images |
| Salix reticulata L. | 430 images |
| Salix scouleriana Barratt ex Hook. | 17 images |
| Salix sericea Marshall | 11 images |
| Salix sitchensis Sanson ex Bong. | 36 images |
| Salix triandra L. | 1762 images |
| Salix uva-ursi Pursh | 8 images |
| Salix vestita Pursh | 2 images |
| Salix viminalis L. | 1746 images |
| Salsola kali L. | 413 images |
| Salsola tragus L. | 16 images |
| Salvia officinalis L. | 10899 images |
| Salvia pratensis L. | 14776 images |
| Salvia reflexa Hornem. | 29 images |
| Salvia sclarea L. | 3547 images |
| Salvia verticillata L. | 1686 images |
| Sambucus ebulus L. | 8755 images |
| Sambucus nigra L. | 27448 images |
| Sambucus racemosa L. | 8267 images |
| Samolus valerandi L. | 854 images |
| Sanguinaria canadensis L. | 1517 images |
| Sanguisorba canadensis L. | 149 images |
| Sanguisorba minor Scop. | 8137 images |
| Sanguisorba officinalis L. | 3115 images |
| Sanicula arctopoides Hook. & Arn. | 121 images |
| Sanicula bipinnatifida Douglas ex Hook. | 1 images |
| Sanicula canadensis L. | 412 images |
| Sanicula crassicaulis Poepp. ex DC. | 208 images |
| Sanicula graveolens Poepp. ex DC. | 18 images |
| Sanicula marilandica L. | 20 images |
| Saponaria officinalis L. | 15251 images |
| Sarcobatus vermiculatus (Hook.) Torr. | 32 images |
| Sarracenia purpurea L. | 1194 images |
| Sassafras albidum (Nutt.) Nees | 1376 images |
| Satureja hortensis L. | 1190 images |
| Saururus cernuus L. | 334 images |
| Saxifraga adscendens L. | 43 images |
| Saxifraga aizoides L. | 1999 images |
| Saxifraga bronchialis L. | 46 images |
| Saxifraga cernua L. | 28 images |
| Saxifraga ferruginea Graham | 3 images |
| Saxifraga hirculus L. | 114 images |
| Saxifraga mertensiana Bong. | 20 images |
| Saxifraga oppositifolia L. | 990 images |
| Saxifraga paniculata Mill. | 2414 images |
| Saxifraga rivularis L. | 13 images |
| Saxifraga sibirica L. | 3 images |
| Saxifraga stellaris L. | 50 images |
| Saxifraga tricuspidata Rottb. | 5 images |
| Saxifraga tridactylites L. | 1292 images |
| Saxifraga virginiensis Michx. | 6 images |
| Scandix pecten-veneris L. | 2608 images |
| Schedonorus arundinaceus (Schreb.) Dumort. | 558 images |
| Schedonorus giganteus (L.) Holub | 113 images |
| Scheuchzeria palustris L. | 104 images |
| Schizachyrium scoparium (Michx.) Nash | 48 images |
| Schoenoplectiella purshiana (Fernald) Lye | 3 images |
| Schoenoplectus pungens (Vahl) Palla | 60 images |
| Schoenoplectus tabernaemontani (C.C. Gmel.) Palla | 1 images |
| Scilla siberica Andrews | 2248 images |
| Scirpus atrovirens Willd. | 176 images |
| Scirpus cyperinus (L.) Kunth | 110 images |
| Scirpus expansus Fernald | 3 images |
| Scirpus hattorianus Makino | 4 images |
| Scirpus pendulus Muhl. | 30 images |
| Scleranthus annuus L. | 266 images |
| Scleranthus perennis L. | 493 images |
| Scopolia carniolica Jacq. | 121 images |
| Scrophularia lanceolata Pursh | 11 images |
| Scrophularia marilandica L. | 47 images |
| Scrophularia nodosa L. | 3670 images |
| Scutellaria angustifolia Pursh | 2 images |
| Scutellaria galericulata L. | 1193 images |
| Scutellaria lateriflora L. | 82 images |
| Scutellaria nervosa Pursh | 1 images |
| Scutellaria parvula Michx. | 29 images |
| Secale cereale L. | 3297 images |
| Securigera varia (L.) Lassen | 1716 images |
| Sedum acre L. | 6915 images |
| Sedum album L. | 9396 images |
| Sedum hispanicum L. | 1177 images |
| Sedum lanceolatum Torr. | 81 images |
| Sedum oreganum Nutt. | 103 images |
| Sedum reflexum L. | 89 images |
| Sedum sarmentosum Bunge | 705 images |
| Sedum sexangulare L. | 1888 images |
| Sedum spathulifolium Hook. | 1334 images |
| Sedum stenopetalum Pursh | 19 images |
| Sedum ternatum Michx. | 323 images |
| Sedum villosum L. | 164 images |
| Sempervivum tectorum L. | 11005 images |
| Senecio eremophilus Richardson | 2 images |
| Senecio hydrophilus Nutt. | 6 images |
| Senecio integerrimus Nutt. | 114 images |
| Senecio jacobaea L. | 239 images |
| Senecio lugens Richardson | 3 images |
| Senecio pseudoarnica Less. | 10 images |
| Senecio squalidus L. | 3045 images |
| Senecio sylvaticus L. | 1627 images |
| Senecio triangularis Hook. | 274 images |
| Senecio viscosus L. | 724 images |
| Senecio vulgaris L. | 9091 images |
| Sesbania herbacea (Mill.) McVaugh | 105 images |
| Setaria italica (L.) P. Beauv. | 2 images |
| Setaria pumila (Poir.) Roem. & Schult. | 2501 images |
| Setaria verticillata (L.) P. Beauv. | 62 images |
| Shepherdia argentea (Pursh) Nutt. | 49 images |
| Shepherdia canadensis (L.) Nutt. | 146 images |
| Sherardia arvensis L. | 3724 images |
| Sibbaldia procumbens L. | 173 images |
| Sibbaldiopsis tridentata (Aiton) Rydb. | 7 images |
| Sicyos angulatus L. | 401 images |
| Sida hermaphrodita (L.) Rusby | 37 images |
| Sida spinosa L. | 168 images |
| Silene acaulis (L.) Jacq. | 2648 images |
| Silene antirrhina L. | 14 images |
| Silene armeria L. | 858 images |
| Silene conoidea L. | 12 images |
| Silene csereii Baumg. | 4 images |
| Silene dichotoma Ehrh. | 717 images |
| Silene douglasii Hook. | 49 images |
| Silene gallica L. | 1593 images |
| Silene latifolia Poir. | 18863 images |
| Silene noctiflora L. | 1214 images |
| Silene pendula L. | 983 images |
| Silene scouleri Hook. | 2 images |
| Silene suecica (Lodd.) Greuter & Burdet | 5 images |
| Silene uralensis (Rupr.) Bocquet | 14 images |
| Silene virginica L. | 289 images |
| Silene vulgaris (Moench) Garcke | 14017 images |
| Silphium integrifolium Michx. | 98 images |
| Silphium laciniatum L. | 227 images |
| Silphium perfoliatum L. | 1272 images |
| Silphium terebinthinaceum Jacq. | 197 images |
| Silybum marianum (L.) Gaertn. | 8641 images |
| Sinapis alba L. | 5971 images |
| Sinapis arvensis L. | 9573 images |
| Sisymbrium altissimum L. | 283 images |
| Sisymbrium loeselii L. | 1180 images |
| Sisymbrium officinale (L.) Scop. | 5479 images |
| Sisymbrium orientale L. | 309 images |
| Sisyrinchium albidum Raf. | 33 images |
| Sisyrinchium angustifolium Mill. | 856 images |
| Sisyrinchium montanum Greene | 155 images |
| Sisyrinchium mucronatum Michx. | 5 images |
| Sium suave Walter | 65 images |
| Smilax herbacea L. | 201 images |
| Smilax lasioneura Hook. | 13 images |
| Smilax rotundifolia L. | 793 images |
| Smilax tamnoides L. | 144 images |
| Solanum americanum Mill. | 5504 images |
| Solanum carolinense L. | 1447 images |
| Solanum dulcamara L. | 13287 images |
| Solanum lycopersicum L. | 11518 images |
| Solanum nigrum L. | 12691 images |
| Solanum physalifolium Rusby | 203 images |
| Solanum rostratum Dunal | 534 images |
| Solanum sisymbriifolium Lam. | 955 images |
| Solanum triflorum Nutt. | 57 images |
| Solanum tuberosum L. | 8330 images |
| Solidago altissima L. | 401 images |
| Solidago arguta Aiton | 6 images |
| Solidago bicolor L. | 104 images |
| Solidago caesia L. | 396 images |
| Solidago canadensis L. | 13406 images |
| Solidago flexicaulis L. | 330 images |
| Solidago gigantea Aiton | 5816 images |
| Solidago hispida Muhl. ex Willd. | 18 images |
| Solidago juncea Aiton | 405 images |
| Solidago latissimifolia Mill. | 2 images |
| Solidago missouriensis Nutt. | 23 images |
| Solidago multiradiata Aiton | 27 images |
| Solidago nemoralis Aiton | 153 images |
| Solidago patula Muhl. ex Willd. | 23 images |
| Solidago puberula Nutt. | 19 images |
| Solidago rugosa Mill. | 957 images |
| Solidago sempervirens L. | 53 images |
| Solidago simplex Kunth | 16 images |
| Solidago speciosa Nutt. | 97 images |
| Solidago squarrosa Nutt. | 12 images |
| Solidago uliginosa Nutt. | 31 images |
| Solidago ulmifolia Muhl. ex Willd. | 60 images |
| Soliva sessilis Ruiz & Pav. | 131 images |
| Sonchus arvensis L. | 4746 images |
| Sonchus asper (L.) Hill | 12600 images |
| Sonchus oleraceus L. | 12619 images |
| Sonchus palustris L. | 245 images |
| Sorbaria sorbifolia (L.) A. Braun | 3 images |
| Sorbus americana Marshall | 195 images |
| Sorbus aucuparia L. | 17829 images |
| Sorbus hybrida L. | 1 images |
| Sorbus scopulina Greene | 51 images |
| Sorghastrum nutans (L.) Nash | 169 images |
| Sorghum bicolor (L.) Moench | 2085 images |
| Sorghum halepense (L.) Pers. | 2746 images |
| Sparganium americanum Nutt. | 14 images |
| Sparganium androcladum (Engelm.) Morong | 3 images |
| Sparganium angustifolium Michx. | 261 images |
| Sparganium emersum Rehmann | 180 images |
| Sparganium eurycarpum Engelm. | 46 images |
| Sparganium natans L. | 50 images |
| Spartina alterniflora Loisel. | 56 images |
| Spartina gracilis Trin. | 4 images |
| Spartina patens (Aiton) Muhl. | 47 images |
| Spartina pectinata Bosc ex Link | 56 images |
| Spergula arvensis L. | 1155 images |
| Spergularia maritima (All.) Chiov. | 1 images |
| Sphaeralcea coccinea (Nutt.) Rydb. | 151 images |
| Sphaerophysa salsula (Pall.) DC. | 16 images |
| Sphenopholis intermedia (Rydb.) Rydb. | 9 images |
| Sphenopholis obtusata (Michx.) Scribn. | 9 images |
| Spinacia oleracea L. | 1497 images |
| Spiraea alba Du Roi | 1866 images |
| Spiraea chamaedryfolia L. | 1764 images |
| Spiraea corymbosa Raf. | 2 images |
| Spiraea douglasii Hook. | 3321 images |
| Spiraea japonica L. f. | 12 images |
| Spiraea prunifolia Siebold & Zucc. | 238 images |
| Spiraea salicifolia L. | 440 images |
| Spiraea thunbergii Siebold ex Blume | 1991 images |
| Spiraea tomentosa L. | 726 images |
| Spiranthes cernua (L.) Rich. | 157 images |
| Spiranthes diluvialis Sheviak | 5 images |
| Spiranthes lacera (Raf.) Raf. | 62 images |
| Spiranthes magnicamporum Sheviak | 26 images |
| Spiranthes ochroleuca (Rydb.) Rydb. | 6 images |
| Spiranthes ovalis Lindl. | 26 images |
| Spiranthes romanzoffiana Cham. | 90 images |
| Sporobolus airoides (Torr.) Torr. | 24 images |
| Sporobolus neglectus Nash | 2 images |
| Stachys annua (L.) L. | 515 images |
| Stachys arvensis (L.) L. | 582 images |
| Stachys byzantina K. Koch | 2 images |
| Stachys chamissonis Benth. | 73 images |
| Stachys germanica L. | 1320 images |
| Stachys mexicana Benth. | 9 images |
| Stachys officinalis (L.) Trevis. | 1386 images |
| Stachys palustris L. | 4822 images |
| Stachys pilosa Nutt. | 16 images |
| Stachys sylvatica L. | 9206 images |
| Stachys tenuifolia Willd. | 10 images |
| Staphylea trifolia L. | 272 images |
| Stellaria alsine Grimm | 217 images |
| Stellaria borealis Bigelow | 3 images |
| Stellaria crassifolia Ehrh. | 20 images |
| Stellaria graminea L. | 3844 images |
| Stellaria holostea L. | 10250 images |
| Stellaria longifolia Muhl. ex Willd. | 9 images |
| Stellaria longipes Goldie | 21 images |
| Stellaria media (L.) Vill. | 11928 images |
| Stellaria nitens Nutt. | 5 images |
| Stellaria obtusa Engelm. | 2 images |
| Stenotus armerioides Nutt. | 9 images |
| Streptopus amplexifolius (L.) DC. | 540 images |
| Streptopus lanceolatus (Aiton) Reveal | 91 images |
| Streptopus streptopoides (Ledeb.) Frye & Rigg | 10 images |
| Strophostyles helvola (L.) Elliott | 73 images |
| Stuckenia filiformis (Pers.) Börner | 4 images |
| Stuckenia pectinata (L.) Börner | 103 images |
| Stylophorum diphyllum (Michx.) Nutt. | 384 images |
| Suaeda maritima (L.) Dumort. | 836 images |
| Subularia aquatica L. | 26 images |
| Succisa pratensis Moench | 4113 images |
| Suksdorfia ranunculifolia (Hook.) Engl. | 2 images |
| Swertia perennis L. | 584 images |
| Symphoricarpos albus (L.) S.F. Blake | 2 images |
| Symphoricarpos orbiculatus Moench | 2966 images |
| Symphyotrichum cordifolium (L.) G.L. Nesom | 6 images |
| Symphyotrichum ericoides (L.) G.L. Nesom | 2 images |
| Symphyotrichum laeve (L.) A. Löve & D. Löve | 1 images |
| Symphyotrichum novae-angliae (L.) G.L. Nesom | 5 images |
| Symphyotrichum novi-belgii (L.) G.L. Nesom | 4 images |
| Symphyotrichum oolentangiense (Riddell) G.L. Nesom | 1 images |
| Symphyotrichum pilosum (Willd.) G.L. Nesom | 6 images |
| Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L. Nesom | 4 images |
| Symphytum asperum Lepechin | 1 images |
| Symphytum officinale L. | 17966 images |
| Symplocarpus foetidus (L.) Salisb. ex W.P.C. Barton | 1 images |
| Syringa vulgaris L. | 19147 images |
| Taenidia integerrima (L.) Drude | 43 images |
| Tagetes erecta L. | 8281 images |
| Tagetes minuta L. | 897 images |
| Tanacetum balsamita L. | 491 images |
| Tanacetum parthenium (L.) Sch. Bip. | 4 images |
| Tanacetum vulgare L. | 16598 images |
| Taraxacum officinale F.H. Wigg. | 22 images |
| Taraxacum palustre (Lyons) Symons | 243 images |
| Taxus brevifolia Nutt. | 962 images |
| Taxus canadensis Marshall | 1015 images |
| Tellima grandiflora (Pursh) Douglas ex Lindl. | 1135 images |
| Tephrosia virginiana (L.) Pers. | 66 images |
| Tetradymia canescens DC. | 81 images |
| Tetraneuris herbacea Greene | 8 images |
| Teucrium botrys L. | 338 images |
| Teucrium canadense L. | 548 images |
| Teucrium scorodonia L. | 7123 images |
| Thalictrum alpinum L. | 62 images |
| Thalictrum aquilegifolium L. | 2 images |
| Thalictrum dioicum L. | 456 images |
| Thalictrum pubescens Pursh | 447 images |
| Thalictrum revolutum DC. | 20 images |
| Thalictrum thalictroides (L.) Eames & B. Boivin | 2 images |
| Thaspium barbinode (Michx.) Nutt. | 33 images |
| Thelypteris noveboracensis (L.) Nieuwl. | 226 images |
| Thelypteris palustris Schott | 293 images |
| Thermopsis gracilis Howell | 12 images |
| Thladiantha dubia Bunge | 112 images |
| Thlaspi arvense L. | 2520 images |
| Thuja occidentalis L. | 6751 images |
| Thymelaea passerina (L.) Coss. & Germ. | 62 images |
| Thymus praecox Opiz | 1934 images |
| Thymus pulegioides L. | 2051 images |
| Thysanocarpus curvipes Hook. | 70 images |
| Tiarella cordifolia L. | 877 images |
| Tiarella trifoliata L. | 148 images |
| Tilia americana L. | 4168 images |
| Tilia cordata Mill. | 10715 images |
| Tilia platyphyllos Scop. | 11459 images |
| Tilia tomentosa Moench | 3581 images |
| Tofieldia pusilla (Michx.) Pers. | 87 images |
| Torilis arvensis (Huds.) Link | 4458 images |
| Torilis japonica (Houtt.) DC. | 1369 images |
| Torilis nodosa (L.) Gaertn. | 797 images |
| Torreyochloa pallida (Torr.) Church | 10 images |
| Townsendia exscapa (Richardson) Porter | 11 images |
| Townsendia hookeri Beaman | 10 images |
| Toxicodendron radicans (L.) Kuntze | 4567 images |
| Toxicodendron rydbergii (Small ex Rydb.) Greene | 116 images |
| Toxicodendron vernix (L.) Kuntze | 67 images |
| Tradescantia occidentalis (Britton) Smyth | 91 images |
| Tradescantia ohiensis Raf. | 751 images |
| Tradescantia virginiana L. | 4590 images |
| Tragopogon dubius Scop. | 5344 images |
| Tragopogon porrifolius L. | 4526 images |
| Trapa natans L. | 318 images |
| Trautvetteria caroliniensis (Walter) Vail | 34 images |
| Triadenum fraseri (Spach) Gleason | 29 images |
| Triadenum virginicum (L.) Raf. | 20 images |
| Triantha glutinosa (Michx.) Baker | 39 images |
| Tribulus terrestris L. | 2101 images |
| Trichophorum alpinum (L.) Pers. | 121 images |
| Trichophorum cespitosum (L.) Hartm. | 340 images |
| Trichophorum pumilum (Vahl) Schinz & Thell. | 19 images |
| Trichostema brachiatum L. | 24 images |
| Trichostema dichotomum L. | 125 images |
| Trichostema oblongum Benth. | 14 images |
| Tridens flavus (L.) Hitchc. | 62 images |
| Trientalis borealis Raf. | 486 images |
| Trientalis europaea L. | 22 images |
| Trifolium arvense L. | 3189 images |
| Trifolium aureum Pollich | 764 images |
| Trifolium campestre Schreb. | 3604 images |
| Trifolium depauperatum Desv. | 41 images |
| Trifolium dubium Sibth. | 2903 images |
| Trifolium fragiferum L. | 1196 images |
| Trifolium hybridum L. | 1387 images |
| Trifolium incarnatum L. | 6142 images |
| Trifolium medium L. | 2326 images |
| Trifolium microcephalum Pursh | 5 images |
| Trifolium oliganthum Steud. | 5 images |
| Trifolium ornithopodioides L. | 48 images |
| Trifolium pannonicum Jacq. | 70 images |
| Trifolium pratense L. | 16956 images |
| Trifolium reflexum L. | 2 images |
| Trifolium repens L. | 11719 images |
| Trifolium resupinatum L. | 1266 images |
| Trifolium subterraneum L. | 580 images |
| Trifolium willdenovii Spreng. | 56 images |
| Trifolium wormskioldii Lehm. | 53 images |
| Triglochin maritima L. | 351 images |
| Triglochin palustris L. | 140 images |
| Trigonella caerulea (L.) Ser. | 52 images |
| Trillium cernuum L. | 70 images |
| Trillium erectum L. | 965 images |
| Trillium flexipes Raf. | 61 images |
| Trillium grandiflorum (Michx.) Salisb. | 868 images |
| Trillium ovatum Pursh | 481 images |
| Trillium undulatum Willd. | 252 images |
| Triodanis perfoliata (L.) Nieuwl. | 535 images |
| Triosteum angustifolium L. | 9 images |
| Triosteum perfoliatum L. | 49 images |
| Triplasis purpurea (Walter) Chapm. | 3 images |
| Triteleia grandiflora Lindl. | 57 images |
| Triteleia hyacinthina (Lindl.) Greene | 85 images |
| Triticum aestivum L. | 21203 images |
| Triticum turgidum L. | 1381 images |
| Trollius laxus Salisb. | 22 images |
| Tsuga canadensis (L.) Carrière | 1257 images |
| Tsuga heterophylla (Raf.) Sarg. | 1014 images |
| Tsuga mertensiana (Bong.) Carrière | 72 images |
| Tulipa sylvestris L. | 3632 images |
| Tussilago farfara L. | 11374 images |
| Typha angustifolia L. | 974 images |
| Typha latifolia L. | 3283 images |
| Ulex europaeus L. | 7048 images |
| Ulmus americana L. | 4213 images |
| Ulmus glabra Huds. | 6848 images |
| Ulmus parvifolia Jacq. | 997 images |
| Ulmus pumila L. | 2666 images |
| Ulmus rubra Muhl. | 132 images |
| Ulmus thomasii Sarg. | 159 images |
| Urtica dioica L. | 13843 images |
| Urtica urens L. | 4076 images |
| Utricularia geminiscapa Benj. | 10 images |
| Utricularia gibba L. | 41 images |
| Utricularia intermedia Hayne | 80 images |
| Utricularia minor L. | 130 images |
| Utricularia purpurea Walter | 12 images |
| Utricularia radiata Small | 12 images |
| Utricularia subulata L. | 31 images |
| Uvularia grandiflora Sm. | 229 images |
| Uvularia perfoliata L. | 69 images |
| Uvularia sessilifolia L. | 114 images |
| Vaccaria hispanica (Mill.) Rauschert | 1276 images |
| Vaccinium angustifolium Aiton | 622 images |
| Vaccinium cespitosum Michx. | 3 images |
| Vaccinium corymbosum L. | 2217 images |
| Vaccinium deliciosum Piper | 11 images |
| Vaccinium macrocarpon Aiton | 312 images |
| Vaccinium membranaceum Douglas ex Torr. | 54 images |
| Vaccinium myrtilloides Michx. | 41 images |
| Vaccinium myrtillus L. | 5192 images |
| Vaccinium ovalifolium Sm. | 40 images |
| Vaccinium ovatum Pursh | 326 images |
| Vaccinium oxycoccos L. | 442 images |
| Vaccinium pallidum Aiton | 134 images |
| Vaccinium parvifolium Sm. | 226 images |
| Vaccinium scoparium Leiberg ex Coville | 23 images |
| Vaccinium stamineum L. | 151 images |
| Vaccinium uliginosum L. | 1444 images |
| Vaccinium vitis-idaea L. | 2625 images |
| Valeriana dioica L. | 2871 images |
| Valeriana officinalis L. | 7462 images |
| Valeriana sitchensis Bong. | 79 images |
| Vallisneria americana Michx. | 8 images |
| Ventenata dubia (Leers) Coss. | 10 images |
| Veratrum viride Aiton | 577 images |
| Verbascum blattaria L. | 3138 images |
| Verbascum lychnitis L. | 3372 images |
| Verbascum nigrum L. | 8845 images |
| Verbascum phlomoides L. | 2596 images |
| Verbascum thapsus L. | 16126 images |
| Verbascum virgatum Stokes | 1359 images |
| Verbena bonariensis L. | 8195 images |
| Verbena bracteata Cav. ex Lag. & Rodr. | 36 images |
| Verbena hastata L. | 1010 images |
| Verbena simplex Lehm. | 66 images |
| Verbena stricta Vent. | 303 images |
| Verbena urticifolia L. | 725 images |
| Verbesina alternifolia (L.) Britton ex Kearney | 553 images |
| Vernonia fasciculata Michx. | 107 images |
| Vernonia gigantea (Walter) Trel. | 13 images |
| Veronica agrestis L. | 1329 images |
| Veronica americana Schwein. ex Benth. | 107 images |
| Veronica anagallis-aquatica L. | 1446 images |
| Veronica arvensis L. | 2934 images |
| Veronica austriaca L. | 2176 images |
| Veronica beccabunga L. | 2409 images |
| Veronica chamaedrys L. | 16567 images |
| Veronica filiformis Sm. | 2931 images |
| Veronica hederifolia L. | 3098 images |
| Veronica officinalis L. | 3029 images |
| Veronica peregrina L. | 305 images |
| Veronica persica Poir. | 14053 images |
| Veronica polita Fr. | 2215 images |
| Veronica scutellata L. | 265 images |
| Veronica serpyllifolia L. | 3077 images |
| Veronica spicata L. | 3490 images |
| Veronica verna L. | 170 images |
| Veronica wormskjoldii Roem. & Schult. | 5 images |
| Veronicastrum virginicum (L.) Farw. | 1056 images |
| Viburnum acerifolium L. | 602 images |
| Viburnum edule (Michx.) Raf. | 17 images |
| Viburnum lantana L. | 13272 images |
| Viburnum lantanoides Michx. | 621 images |
| Viburnum lentago L. | 252 images |
| Viburnum nudum L. | 227 images |
| Viburnum opulus L. | 18969 images |
| Viburnum rafinesqueanum Schult. | 3 images |
| Viburnum recognitum Fernald | 58 images |
| Vicia americana Muhl. ex Willd. | 63 images |
| Vicia caroliniana Walter | 49 images |
| Vicia cracca L. | 6849 images |
| Vicia hirsuta (L.) Gray | 1828 images |
| Vicia lathyroides L. | 332 images |
| Vicia nigricans Hook. & Arn. | 16 images |
| Vicia sativa L. | 12779 images |
| Vicia sepium L. | 5801 images |
| Vicia tetrasperma (L.) Schreb. | 493 images |
| Vicia villosa Roth | 8257 images |
| Vinca major L. | 15439 images |
| Vinca minor L. | 15065 images |
| Viola adunca Sm. | 176 images |
| Viola arvensis Murray | 4713 images |
| Viola bicolor Pursh | 194 images |
| Viola biflora L. | 995 images |
| Viola blanda Willd. | 223 images |
| Viola canadensis L. | 216 images |
| Viola cucullata Aiton | 21 images |
| Viola glabella Nutt. | 155 images |
| Viola labradorica Schrank | 205 images |
| Viola lanceolata L. | 55 images |
| Viola nephrophylla Greene | 1 images |
| Viola odorata L. | 14525 images |
| Viola palustris L. | 932 images |
| Viola pedata L. | 165 images |
| Viola pubescens Aiton | 710 images |
| Viola purpurea Kellogg | 113 images |
| Viola rotundifolia Michx. | 45 images |
| Viola sagittata Aiton | 97 images |
| Viola selkirkii Pursh ex Goldie | 8 images |
| Viola sempervirens Greene | 118 images |
| Viola sororia Willd. | 1382 images |
| Viola striata Aiton | 249 images |
| Viola tricolor L. | 7742 images |
| Vitis aestivalis Michx. | 1272 images |
| Vitis labrusca L. | 473 images |
| Vitis riparia Michx. | 665 images |
| Vitis vulpina L. | 942 images |
| Vulpia bromoides (L.) Gray | 160 images |
| Vulpia microstachys (Nutt.) Munro | 18 images |
| Vulpia octoflora (Walter) Rydb. | 10 images |
| Waldsteinia fragarioides (Michx.) Tratt. | 34 images |
| Woodsia alpina (Bolton) Gray | 61 images |
| Woodsia obtusa (Spreng.) Torr. | 12 images |
| Woodwardia areolata (L.) T. Moore | 105 images |
| Woodwardia fimbriata Sm. | 190 images |
| Woodwardia virginica (L.) Sm. | 14 images |
| Xanthium spinosum L. | 954 images |
| Xanthium strumarium L. | 4904 images |
| Xerophyllum tenax (Pursh) Nutt. | 126 images |
| Xyris difformis Chapm. | 2 images |
| Xyris montana Ries | 3 images |
| Yabea microcarpa (Hook. & Arn.) Koso-Pol. | 6 images |
| Yucca flaccida Haw. | 226 images |
| Yucca glauca Nutt. | 160 images |
| Zannichellia palustris L. | 56 images |
| Zanthoxylum americanum Mill. | 206 images |
| Zea mays L. | 23852 images |
| Zizania aquatica L. | 12 images |
| Zostera marina L. | 120 images |
| Zoysia japonica Steud. | 9 images |