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932 gentians, dogbanes, madders, and allies species
Gentianella auriculata
Frasera paniculata
Gardenia carinata
Geniostoma triflorum
Asclepias texana
Asclepias pedicellata
Guettarda speciosa
Asclepias oenotheroides
Amsonia jonesii
Sabatia tuberculata
Geniostoma hymenopodum
Gardenia tannaensis
Matelea reticulata
Psychotria ligustrifolia
Amsonia arenaria
Houstonia serpyllifolia
Asclepias meadii
Gentiana purpurea
Geniostoma pumilum
Asclepias feayi
Gentiana asclepiadea
Strophanthus preussii
Hoya carnosa
Cerbera manghas
Geniostoma lydgatei
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