Flora 45: 475 (1862). Type locality: Cameroon, Mt. Cameroon, 1800 m, G. Mann 6 (H-NYL 38411 - lectotype; BM, H-NYL, US - isolectotype). Lectotypification by Ahti (1977).
Type locality: Cameroon, Mt. Cameroon, 1800 m, G. Mann 6 (H-NYL 38411 - lectotype; BM, H-NYL, US - isolectotype). Lectotypification by Ahti (1977).