Cephalophyllum rigidum leaves

The succulent, erect leaves of Cephalophyllum rigidum grow in opposite pairs, somewhat triangular in cross-section from a deep keel, but slightly rounded towards sub-cylindrical. The bluntly pointed leaf tips may curve in slightly. The dark green to grey green, sometimes paler green surfaces are slightly and variably rough. The leaves are from 4 cm to 9 cm long.

The photo was taken near Springbok (Smith, et al, 1998; iNaturalist; https://www.worldfloraonline.org).