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Achillea millefolium L.LC
Least Concern

Common yarrow
25,002 20,869 Observations
Asteraceae
Achillea millefolium
Achillea millefolium
Achillea millefolium
Achillea millefolium

Ambrosia artemisiifolia L.

Annual ragweed
4,705 3,713 Observations
Asteraceae
Ambrosia artemisiifolia
Ambrosia artemisiifolia
Ambrosia artemisiifolia
Ambrosia artemisiifolia

Ambrosia psilostachya DC.

Dunbible-weed
358 267 Observations
Asteraceae
Ambrosia psilostachya
Ambrosia psilostachya
Ambrosia psilostachya
Ambrosia psilostachya

Ambrosia tenuifolia Spreng.

Bur ragweed
51 31 Observations
Asteraceae
Ambrosia tenuifolia
Ambrosia tenuifolia
Ambrosia tenuifolia
Ambrosia tenuifolia

Ambrosia trifida L.

Giant Ragweed
947 776 Observations
Asteraceae
Ambrosia trifida
Ambrosia trifida
Ambrosia trifida
Ambrosia trifida

Anacyclus clavatus (Desf.) Pers.

Whitebuttons
2,396 1,546 Observations
Asteraceae
Anacyclus clavatus
Anacyclus clavatus
Anacyclus clavatus
Anacyclus clavatus

Anacyclus radiatus Loisel.

Yellow button.
1,218 886 Observations
Asteraceae
Anacyclus radiatus
Anacyclus radiatus
Anacyclus radiatus
Anacyclus radiatus

Anacyclus valentinus L.

Bachelor's button
14 10 Observations
Asteraceae
Anacyclus valentinus
Anacyclus valentinus
Anacyclus valentinus
Anacyclus valentinus

Andryala integrifolia L.

Common Andryala
3,584 2,487 Observations
Asteraceae
Andryala integrifolia
Andryala integrifolia
Andryala integrifolia
Andryala integrifolia

Anthemis arvensis L.

Field chamomile
3,639 2,761 Observations
Asteraceae
Anthemis arvensis
Anthemis arvensis
Anthemis arvensis
Anthemis arvensis

Anthemis cotula L.

Chamomile
1,464 1,151 Observations
Asteraceae
Anthemis cotula
Anthemis cotula
Anthemis cotula
Anthemis cotula

Arctium lappa L.

Great Burdock
9,582 7,688 Observations
Asteraceae
Arctium lappa
Arctium lappa
Arctium lappa
Arctium lappa

Arctium minus (Hill) Bernh.

Common burdock
11,241 8,746 Observations
Asteraceae
Arctium minus
Arctium minus
Arctium minus
Arctium minus

Artemisia annua L.

Sweet sagewort
3,337 2,742 Observations
Asteraceae
Artemisia annua
Artemisia annua
Artemisia annua
Artemisia annua

Artemisia biennis Willd.

Biennial wormwood
132 72 Observations
Asteraceae
Artemisia biennis
Artemisia biennis
Artemisia biennis
Artemisia biennis

Artemisia campestris L.

Field sagewort
1,528 1,100 Observations
Asteraceae
Artemisia campestris
Artemisia campestris
Artemisia campestris
Artemisia campestris

Artemisia verlotiorum Lamotte

Mugwort
1,941 1,465 Observations
Asteraceae
Artemisia verlotiorum
Artemisia verlotiorum
Artemisia verlotiorum
Artemisia verlotiorum

Artemisia vulgaris L.

Mugwort
16,297 12,788 Observations
Asteraceae
Artemisia vulgaris
Artemisia vulgaris
Artemisia vulgaris
Artemisia vulgaris

Asteriscus aquaticus (L.) Less.

Golden Starwort
468 319 Observations
Asteraceae
Asteriscus aquaticus
Asteriscus aquaticus
Asteriscus aquaticus
Asteriscus aquaticus

Atractylis cancellata L.

Cage thistle
232 113 Observations
Asteraceae
Atractylis cancellata
Atractylis cancellata
Atractylis cancellata
Atractylis cancellata

Bellis annua L.

Annual daisy
5,023 4,232 Observations
Asteraceae
Bellis annua
Bellis annua
Bellis annua
Bellis annua

Bellis perennis L.

Daisy
14,276 12,241 Observations
Asteraceae
Bellis perennis
Bellis perennis
Bellis perennis
Bellis perennis

Bidens aurea (Aiton) Sherff

Arizona beggar-ticks
982 781 Observations
Asteraceae
Bidens aurea
Bidens aurea
Bidens aurea
Bidens aurea

Bidens bipinnata L.

Spanish-needles
1,241 1,104 Observations
Asteraceae
Bidens bipinnata
Bidens bipinnata
Bidens bipinnata
Bidens bipinnata

Bidens frondosa L.LC
Least Concern

Devil's Beggarticks
2,716 1,949 Observations
Asteraceae
Bidens frondosa
Bidens frondosa
Bidens frondosa
Bidens frondosa

Bidens pilosa L.

Spanish-needles
2,796 2,042 Observations
Asteraceae
Bidens pilosa
Bidens pilosa
Bidens pilosa
Bidens pilosa

Bidens subalternans DC.

Greater beggar's ticks
403 222 Observations
Asteraceae
Bidens subalternans
Bidens subalternans
Bidens subalternans
Bidens subalternans

Bidens tripartita L.LC
Least Concern

Three-lobe Beggar-ticks
1,082 747 Observations
Asteraceae
Bidens tripartita
Bidens tripartita
Bidens tripartita
Bidens tripartita

Calendula arvensis (Vaill.) L.

Field marigold
470 377 Observations
Asteraceae
Calendula arvensis
Calendula arvensis
Calendula arvensis
Calendula arvensis

Carduus nutans L.

Musk thistle
4,267 3,051 Observations
Asteraceae
Carduus nutans
Carduus nutans
Carduus nutans
Carduus nutans

Carduus pycnocephalus L.

Slender thistle
4,139 2,959 Observations
Asteraceae
Carduus pycnocephalus
Carduus pycnocephalus
Carduus pycnocephalus
Carduus pycnocephalus

Carduus tenuiflorus Curtis

Slender thistle
1,119 715 Observations
Asteraceae
Carduus tenuiflorus
Carduus tenuiflorus
Carduus tenuiflorus
Carduus tenuiflorus

Carlina lanata L.

Woolly Carline Thistle
116 60 Observations
Asteraceae
Carlina lanata
Carlina lanata
Carlina lanata
Carlina lanata

Carlina vulgaris L.

Carline thistle
1,946 1,434 Observations
Asteraceae
Carlina vulgaris
Carlina vulgaris
Carlina vulgaris
Carlina vulgaris

Carthamus caeruleus L.

Blue Thistle
165 101 Observations
Asteraceae
Carthamus caeruleus
Carthamus caeruleus
Carthamus caeruleus
Carthamus caeruleus

Carthamus lanatus L.

Distaff thistle
1,506 1,041 Observations
Asteraceae
Carthamus lanatus
Carthamus lanatus
Carthamus lanatus
Carthamus lanatus

Centaurea aspera L.

Rough star thistle
3,316 2,290 Observations
Asteraceae
Centaurea aspera
Centaurea aspera
Centaurea aspera
Centaurea aspera

Centaurea benedicta (L.) L.

Blessed thistle
321 182 Observations
Asteraceae
Centaurea benedicta
Centaurea benedicta
Centaurea benedicta
Centaurea benedicta

Centaurea calcitrapa L.

Red star thistle
1,587 1,100 Observations
Asteraceae
Centaurea calcitrapa
Centaurea calcitrapa
Centaurea calcitrapa
Centaurea calcitrapa

Centaurea collina L.

Upland Starthistle
729 447 Observations
Asteraceae
Centaurea collina
Centaurea collina
Centaurea collina
Centaurea collina

Centaurea diffusa Lam.

Tumble knapweed
169 117 Observations
Asteraceae
Centaurea diffusa
Centaurea diffusa
Centaurea diffusa
Centaurea diffusa

Centaurea diluta Aiton

Lesser Star-thistle
24 19 Observations
Asteraceae
Centaurea diluta
Centaurea diluta
Centaurea diluta
Centaurea diluta

Centaurea jacea L.

Meadow knapweed
13,738 10,763 Observations
Asteraceae
Centaurea jacea
Centaurea jacea
Centaurea jacea
Centaurea jacea

Centaurea melitensis L.

Maltese centaury
740 521 Observations
Asteraceae
Centaurea melitensis
Centaurea melitensis
Centaurea melitensis
Centaurea melitensis

Centaurea napifolia L.

Nateesha Flame
387 279 Observations
Asteraceae
Centaurea napifolia
Centaurea napifolia
Centaurea napifolia
Centaurea napifolia
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