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A curious plant found in the same hills is the cactus-like Boucerosia (N.O. Asclepiadaceae), recalling to botanists the more familiar Stapelias of the same order.
Another leafless Asclepiad, Periploca aphylla, which extends westwards to Arabia and Nubia and southwards to Sindh, is, like Boucerosia, a typical xerophyte adapted to a very dry soil and atmosphere.