Multi-stemmed densely branched shrub, 0.3-1.3 m tall, lignotuberous. Leaves alternate in lower parts, usually whorled in flowering parts, shallowly concave, narrowly obovate, very rigid, 4.5-12 cm long, 5-14 mm wide, entire, acuminate to rounded-mucronate, midgreen; longitudinal veins prominent at least on underside, 1 above (sometimes obscure) and 1-3 below; pinnate veins visible but obscure. Inflorescence with 14-18 flowers; pedicels 2-3 mm long, glabrous. Perianth pale yellowish green proximally, deep yellow distally, split to base abaxially only. Pistil 28-31 mm long; gland obovoid. Fruit 1 or 2 per axil, obliquely ovate to obovate in lateral view, 2.2-2.4 cm long, 1.1-1.4 cm wide, shortly beaked and apiculate, not corky. Seed obliquely ovate, 15-17 mm long, 8-10 mm wide; wing extending down both sides of body, blackish brown, sometimes with paler streaks.
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