Erect shrub, 0.7-2.4 m tall, possibly lignotuberous. Leaves ±uniform, alternate, ±rigid, flat or shallowly concave, narrowly obovate to linear, 6-16 cm long, 8-18 mm wide, entire, acute to acuminate, grey-green; longitudinal veins prominent, 1-3 above, 3-6 below; pinnate veins visible but often obscure. Inflorescence with 40-56 flowers; pedicels 4-6 mm long, glabrous. Perianth yellow, splitting into 4 free segments. Pistil 22-23 mm long; gland U-shaped. Fruit 1-5 per axil, obliquely narrowly ovate, 2.2-2.5 cm long, 0.6-0.9 cm wide, not beaked, not apiculate, not corky. Seed obliquely narrowly ovate, 12-13 mm long, 4-5 mm wide; wing extending narrowly down both sides of body, dark grey-brown, sometimes with blackish patches.
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