Euphorbia caput-medusae L.

Monoecious, spineless, glabrous succulent, up to 0.2-0.9 x 0.15-1 m, with a rosette of branches from a stout, obconic stem, branches ascending, ± clavate, 10-30 mm thick, tuberculate. Leaves soon deciduous, linear, 5-40 x ± 2 mm, ± fleshy. Cyathia many around apex of each branch, each on a sometimes persistent peduncle 5-15 mm long in axil of tubercle, 9-18 mm diam., with 5 green glands each with 3-6 cream, often divided processes on outer margin, covered with small protuberances. Capsule sessile, 6-8 mm diam., occasionally pubescent.