云南叶轮木 yun nan ye lun mu

Ostodes kuangii Y. T. Chang.

Trees up to 15 m tall, to 30 cm d.b.h., monoecious; young branches with yellow-brown, appressed pubescence, glabrescent. Petiole 3-7 cm, densely tomentose to glabrescent; leaf blade ovate, ovate-lanceolate, oblong-lanceolate to elliptic-lanceolate, 10-22 × 5-10 cm, thinly leathery, both surfaces densely tomentose when young, glabrescent, or abaxial surface and midrib becoming pubescent, base rounded to broadly cuneate, apex acuminate to caudate-acuminate; lateral veins 7-9 pairs. Inflorescences racemelike, axils densely tomentose; male inflorescences 10-30 cm, female inflorescences shorter. Male flowers: sepals 5, unequal, tomentose outside; petals obovate, bearded at base; disk with irregular lobes; stamens to 40. Female flowers: ovary densely yellow-brown tomentose. Capsules slightly depressed globose, ca. 2.5 × 3 cm, densely brown tomentulose, obscurely sparsely elevated-verrucose. Seeds ellipsoidal or ovoid, ca. 1.5 × 1.3 cm, maroon-brown, with stripes of obscurely yellow spots, glossy. Fl. Apr-Jun, fr. Jul-Aug.

Dense forests; 900-2000 m. SE Xizang, S Yunnan [N Thailand].