Actinostemon is a plant genus of the family Euphorbiaceae first described as a genus in 1841. It is native to South America, Central America, and the West Indies. • # Actinostemon amazonicus - Peru, S Venezuela, N Brazil • # Actinostemon brachypodus - Pinar del Río, La Habana • # Actinostemon caribaeus - Costa Rica, Nicaragua, Lesser Antilles, Trinidad, N Venezuela • # Actinostemon concepcionis - Paraguay, S Brazil, Corrientes • # Actinostemon concolor - Paraguay, S Brazil, Uruguay, Bolivia, Misiones • # Actinostemon desertorum - S Brazil • # Actinostemon echinatus - Pernambuco, Rio de Janeiro • # Actinostemon glaziovii - Rio de Janeiro, Minas Gerais • # Actinostemon guyanensis - Guyana • # Actinostemon imbricatus - NW Brazil • # Actinostemon klotzschii - Brazil, Bolivia • # Actinostemon lagoensis - S Brazil • # Actinostemon lasiocarpus - E Brazil • # Actinostemon leptopus - S Brazil • # Actinostemon macrocarpus - S Brazil • # Actinostemon mandiocanus - Rio de Janeiro • # Actinostemon schomburgkii - Venezuela, 3 Guianas, N Brazil, Bolivia • # Actinostemon sparsifolius - S Brazil • # Actinostemon verticillatus - E Brazil moved to other genera: Gymnanthes Sebastiania • # A. anisandrus - Sebastiania brasiliensis • # A. brasiliensis - Sebastiania brasiliensis • # A. jamaicensis - Gymnanthes glandulosa • # A. luquensis - Sebastiania brasiliensis • # A. unciformis - Sebastiania klotzschiana