Himatanthus is a genus of flowering plant in the family Apocynaceae, first described as a genus in 1819. It is native to Panama and South America.SpeciesHimatanthus articulatus (Vahl) Woodson - widespread from Panama east to French Guiana and south to Bolivia Himatanthus attenuatus (Benth.) Woodson - Venezuela, Colombia, N Brazil Himatanthus bracteatus (A.DC.) Woodson - Venezuela, Colombia, Guianas, Brazil, Peru, Ecuador Himatanthus drasticus (Mart.) Plumel - Guianas, Brazil Himatanthus lancifolius (Müll.Arg.) Woodson Himatanthus obovatus (Müll.Arg.) Woodson - Brazil, Bolivia, Guyana Himatanthus phagedaenicus (Mart.) Woodson - S Venezuela, NW Brazil Himatanthus semilunatus Markgr. - Amazon Basin Himatanthus stenophyllus Plumel - Colombia, NW Brazil, Guyana, Suriname Himatanthus tarapotensis (K.Schum. ex Markgr.) Plumel - Colombia, Bolivia, Brazil, Peru, Ecuador