ISI 2006-21. Euphorbia richardsiae L. C. Leach ssp. richardsiae

This resembles its Zambian relative E. jubata in its deep green stems with 4 - 5 short-spined ribs that, when in growth, are lined with relatively prominent mule-ear-like leaves. Though only about 1 cm long, their elliptical, acutely pointed, sessile blades are conspicuous compared to those of most spiny African euphorbias. E. richardsiae also stands out in possessing bright red cyathia in winter. Rooted cuts of HBG 87368, a plant from Abbey Garden via Seymour Linden in 1985. This is most likely the clonotype, as propagator Frank Horwood received material from Leach when he was at Abbey Garden in the 1970s and 80s. The species is native to the Northern Prov. of Malawi, where it grows in granite hills to 2000 m. $5.

Photo © 2006 by John N. Trager. Images may not be used elsewhere without permission.

Published in the Cactus and Succulent Journal, Vol. 78 (2), March - April, 2006