Pole-Evans, I.B., Phillips, E.P., Dyer, R.A., Codd, L.E., The flowering plants of South Africa (flowering plants of Africa) [originals] [2318]
Fl. Pl. S. Afr.
vol. 25 (1945) [40]
Link to this page:
http://plantillustrations.org/volume.php?id_volume=6010 not available (localhost only)