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932 gentians, dogbanes, madders, and allies species
Houstonia longifolia
Vincetoxicum nigrum
Asclepias ovalifolia
Halenia deflexa
Gentiana calycosa
Gentianopsis virgata
Centaurium pulchellum
Gentiana sceptrum
Gentianella propinqua
Frasera speciosa
Gentiana douglasiana
Gentiana puberulenta
Centaurium erythraea
Gentiana glauca
Galium circaezans
Gentianella quinquefolia
Galium palustre
Gentiana clausa
Asclepias amplexicaulis
Galium verum
Galium trifidum
Asclepias sullivantii
Galium asprellum
Asclepias purpurascens
Gentiana affinis
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