Shrub or rarely small tree, 0.3-5 m tall, lignotuberous. Branchlets densely pale-lenticellate, ribbed, densely tomentose to densely appressed-pubescent or-sericeous, glabrescent by flowering or not. Leaves narrowly divergent, somewhat rigid to flexible, terete, usually not grooved, rarely grooved at very base below, (3.5-) 5.5-10.5 (-13.5) cm long, 0.8-1.3 mm wide, smooth or densely longitudinally wrinkled, moderately appressed-pubescent or moderately to densely appressed-sericeous, quickly glabrescent; mucro porrect, (0.8-) 0.9-1.4 (-2.2) mm long. Inflorescence axillary umbel of 1-6 flowers; rachis elongated or knob-like, simple, 0.6-1 mm long, densely woolly-tomentose with ferruginous hairs; pedicels 1.8-3 mm long, sparsely to densely appressed-sericeous, with white and ferruginous hairs. Perianth 3.1-4.3 mm long, white, glabrous, often glaucous. Pistil 6.7-8 mm long. Fruit ovate to obovate, usually obliquely so, 2.2-3.4 cm long, 1.6-2.5 cm wide, smooth, minutely to finely lenticellate, or moderately to coarsely pustulate or with ruptured crests; beak transverse or oblique and long-decurrent down one side of fruit body; horns and apiculum obscure. Seed 1.6-2.5 cm long, (0.8-) 0.9-1.1 mm wide; wing decurrent usually fully down both sides, narrower on pale wood zone side, rarely absent, black or dark blackish brown sometimes with yellow patches.
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