Sclerodactylon is a genus of plants in the grass family, native to eastern Africa and to various islands in the Indian Ocean. Species The only known species is Sclerodactylon macrostachyum, native to Tanzania, Mozambique, Madagascar, Comoros, Aldabra, Seychelles, and the Andaman & Nicobar Islands. formerly included see Acrachne \n* Sclerodactylon micrandrum - Acrachne racemosa