Geissospermum is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1846. It is native to South America. Species \n* Geissospermum argenteum Woodson - Venezuela, the Guianas \n* Geissospermum fuscum Markgr - S Venezuela, NW Brazil \n* Geissospermum laeve (Vell.) Miers - N + E Brazil, the Guianas \n* Geissospermum reticulatum A.H.Gentry - S Venezuela, Peru, N Bolivia \n* Geissospermum sericeum Miers - Guyana, Suriname, French Guiana \n* Geissospermum urceolatum A.H.Gentry - NW Brazil