Liede, S. & Nicholas, A. (1992) A Revision of the Genus Pentarrhinum E. Meyer (Asclepiadaceae) Kew Bulletin 47(3) 475-490
| Species | FZ divisions | Content |
| abyssinicum Decne. subsp. abyssinicum | N,C,S | Description, Image |
| abyssinicum Decne. subsp. angolense (N.E. Br.) Liede & Nicholas | C | Description |
| insipidum E. Mey. | Description, Image |