Erect tree to 8 m or compact shrub 2-3 m high; lignotuber unknown. Branchlets moderately to densely appressed-pubescent on new growth, quickly glabrescent, and glaucous in second year. Leaves simple, or rarely divided apically into 2 or 3 segments, 1-6 cm long, 1.5-2.5 mm wide, rigid, initially densely (very quickly sparsely) appressed-pubescent; mucro porrect, 1-2.3 mm long. Inflorescence axillary with 4-28 flowers; rachis obscure, persistent; pedicels 3.5-7 mm long, appressed-pubescent with white, rarely ferruginous hairs continuing onto perianth; buds curved. Perianth 3.5-4.2 mm long, pale yellow. Pistil 7-10 mm long; gland 0.7 mm high. Fruit obliquely ovate or elliptic, dilated apically, 1.9-2 (-2.7) cm long, (0.7-) 0.9-1.1 cm wide, smooth and grey or black with black pusticules, dehiscing fully down both sides; beak absent; horns 1-1.5 mm long; apiculum c. 1 mm long. Seed ovate, c. 17 mm long; wing broadly and partly down one side only, brown or yellow.
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