Shrub to 2 m; rhizome c. 1-4 cm diam. Stems glabrous. Leaves 5-7-nerved, obovate to elliptic, acuminate to cuspidate, tapering at base, c. 6-18 cm long, 2-6 cm wide; petiole 3-5 mm long. Flowers numerous; peduncle 20-35 mm long; pedicel 15-30 mm long. Sepals and petals oblanceolate, the apex shortly acuminate and involute, 7-9 mm long, 3-4 mm wide. Stamens 6-8 mm long; filaments spreading, 3-4 mm long; anthers 3-4 mm long. Ovary glabrous, 3-4 mm diam.; style 1-2 mm long; stigma lobes 2-3 mm long. Capsule 3-lobed, rugose, 8-15 mm diam. Seeds 4-6 mm diam., yellow or brown.