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932 gentians, dogbanes, madders, and allies species
Asclepias curtissii
Sabatia campestris
Stephanotis floribunda
Serissa japonica
Rubia tinctorum
Asclepias involucrata
Asclepias lanceolata
Houstonia procumbens
Asclepias glaucescens
Cascabela thevetia
Beaumontia grandiflora
Morinda royoc
Spermacoce latifolia
Hoya bella
Nauclea latifolia
Chthamalia producta
Alstonia scholaris
Mandevilla foliosa
Mandevilla hypoleuca
Funastrum elegans
Asclepias auriculata
Tabernaemontana alba
Uncaria tomentosa
Metastelma arizonicum
Zeltnera multicaulis
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