Compact to spreading or depauperate single-stemmed shrub, 0.3-2 m high, non-lignotuberous. Branchlets ribbed, densely appressed-pubescent, quickly glabrescent or persistent to flowering, mid-red when young. Leaves rigid, terete, sometimes grooved below, (1-) 1.8-3.5 (-5.5) cm long, 1.1-1.8 mm wide, sparsely appressed-pubescent, quickly glabrescent; mucro c. 0.5-1.5 mm long. Inflorescence with (1-) 3-6 (-7) flowers; rachis simple, 0.5-1.2 mm long, densely white woolly-tomentose. Flowers yellow; pedicels 1.8-3.3 mm long, moderately densely woolly-tomentose. Perianth 1.5-2 mm long, glabrous or sparsely tomentose. Pistil (3.5-) 4.2-4.5 mm long; gland minute. Fruit woody, remaining closed, elliptic, coarsely bluntly tuberculate, 2.9-3.5 cm long, 2.3-2.6 cm wide; beak tuberculate, short and broad, decurrent unequally down both sides of fruit body; horns obscure or absent. Seed displaced from centre, not marginal, elliptic to obliquely obovate, 22-25 mm long, 10-12 mm wide; wing decurrent broadly 1/2-3/4 way down one side only, deep brown.
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