Haematostemon is a genus of plant of the family Euphorbiaceae first described as a genus in 1919. It is native to northeastern South America (Guyana and S Venezuela). Species Haematostemon coriaceus (Baill.) Pax & K.Hoffm. - Amazonas State in S Venezuela Haematostemon guianensis Sandwith - Potaro-Siparuni region of Guyana References Plukenetieae Flora of South America Euphorbiaceae genera