Erect shrub, 2-4 m tall, non-sprouting. Branchlets patchily tomentose with pale rust-brown hairs to glabrescent at flowering. Leaves curved, linear to narrowly obovate, flat, 5-14 cm long, 3-9 mm wide, narrowly cuneate at base, entire, acute to acuminate; longitudinal veins 3 (rarely 4), above and below; secondary veins pinnate, inconspicuous to obscure. Inflorescence solitary with 25-40 flowers; pedicels longer than perianth, glabrous. Perianth cream. Pistil 4.5-6.5 mm long, cream; gland vestigial or absent. Fruit obliquely narrowly ovate, curved, 2-2.5 cm long, 0.7-1 cm wide, prominently beaked. Seed narrowly ovate, concave towards base abaxially, 17-20 mm long; wing extending fully or partly down one side of body only, blackish brown to black.