Tree 5–25 (–30) m high. Leaves: petiole 8–15 mm long; lamina ovate to narrowly ovate, 9.5–26 cm long, 2–7 cm wide, shortly attenuate and sometimes slightly oblique at base, serrate, acuminate at apex, sparsely to densely hispid-strigose beneath, particularly on nerves and midrib, rarely almost glabrous; midrib sunken above, raised and prominent beneath; veins visible on both surfaces, raised and prominent beneath. Inflorescence paniculate, with each branchlet terminating in 3 flowers. Tepals pale green to yellowish green. Stamens pale green. Fruiting hypanthium 15–35 mm long. Achenes 6–7 mm long, long-plumose; style 10–13 mm long.