Erect shrub, 0.6-2 m tall, non-sprouting. Branchlets glabrous by flowering. Leaves obovate to elliptic, sometimes undulate, 5-11.2 cm long, 16-43 mm wide, narrowly cuneate at base, entire, acute to acuminate; longitudinal veins 3 above and below; secondary veins reticulate, equally or less conspicuous. Inflorescence solitary with 12-18 flowers; pedicels glabrous. Perianth pale to deep pink. Pistil 9-10.5 mm long; gland vestigial or absent. Fruit obliquely ovate, 3-4 cm long, 1.5-1.9 cm wide, obscurely beaked, with a dorsal longitudinal ridge on each valve. Seed obliquely ovate, c. 28 mm long; wing extending narrowly and partly down one side of body only, blackish brown.