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Explore
World flora
Genera
Plants of the world flora
Search
Family
Rubiaceae
Genera
Species
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6
genera
Sort by
A › Z
Z › A
Most observed
Least observed
Most illustrated
Least illustrated
Species count: High to low
Species count: Low to high
Asperula
1
species
169
85
observations
Cephalanthus
1
species
1541
1293
observations
Galium
19
species
50615
40554
observations
Houstonia
2
species
600
558
observations
Mitchella
1
species
1030
902
observations
Sherardia
1
species
4384
3226
observations
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Genera