Tetrorchidium Poepp. & Endl. Tetrorchidium Poepp. & Endl., Nova Gen. Sp. Pl. 3: 23. 1841 sec. Radcliffe-Smith 2001=Hasskarlia Baill. in Adansonia 1: 51. 1860 syn. sec. Radcliffe-Smith 2001=Tetrorchidiopsis Rauschert in Taxon 31: 559. 1982 syn. sec. Radcliffe-Smith 2001