Ann. Mo. Bot. Gard. 43: 392 (1956). Type locality: Zimbabwe ["Southern Rhodesia"], Makon Inyanga District, summit of Forrest-Hill Kop, 1700 m, on shaded rock face, Frederick Eyles 827 "Kew" (BM - holotype).
Type locality: Zimbabwe ["Southern Rhodesia"], Makon Inyanga District, summit of Forrest-Hill Kop, 1700 m, on shaded rock face, Frederick Eyles 827 "Kew" (BM - holotype).