Sandwithia is a plant genus of the family Euphorbiaceae first described in 1932. It is native to northern South America. It is dioecious. Species Sandwithia guyanensis Lanj. - French Guiana, Guyana, Venezuela, N Brazil Sandwithia heterocalyx Secco - SE Colombia, S Venezuela, N Brazil References Aleuritideae Euphorbiaceae genera Flora of South America Dioecious plants