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932 gentians, dogbanes, madders, and allies species
Nauclea orientalis
Holarrhena mitis
Rauvolfia vomitoria
Gentiana angustifolia
Gynochthodes myrtifolia
Gentiana aquatica
Galium angustifolium
Asperula arvensis
Centaurium tenuiflorum
Asclepias subulata
Vallesia glabra
Vallesia antillana
Allamanda cathartica
Matelea obliqua
Gentiana septemfida
Alstonia macrophylla
Cynanchum ligulatum
Frasera coloradensis
Galium arkansanum
Galium correllii
Galium fendleri
Gardenia mannii
Gardenia remyi
Gardenia taitensis
Gelsemium rankinii
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