Tassadia is a genus of plants in the Apocynaceae, first described as a genus in 1844. It is native primarily to South America, with one species extending north into Central America, S Mexico, and Trinidad. moved to other genera (Orthosia, Stenomeria) 1. \n* Tassadia hutchisoniana, syn of Stenomeria decalepis 2. \n* Tassadia rhombifolia, syn of Stenomeria decalepis 3. \n* Tassadia subulata, syn of Orthosia scoparia