Euphorbia officinarum subsp. echinus

Though often listed simply as Euphorbia echinus, this plant is very similar to the taller-growing E. officinarum, and it has now been named as a subspecies under that species. It forms a low spiny mound with many branches packed tightly together, and it has dark purplish-red flowering structures (cyathia) that can be seen in the lower photo. It is one of the many Euphorbia species with spiny stems that look very cactus-like, though they are in a completely different family. From southwestern Morocco (the closely related E. officinarum subsp. officinarum has a wider distribution, occurring not only in Morocco, but also in neighboring Algeria, Mauritania, and Western Sahara).

Haworthiopsis coarctata

All of the plants now placed in Haworthiopsis were formerly placed in Haworthia, but they differ in floral details and in their more rigid leaves, often adorned with white tubercles. Some of the species have a stacking habit, forming little columns of leaves like the plant shown. H. coarctata comes from South Africa's Eastern Cape Province, to the west of the Fish River.