Sterculia euosma W. W. Sm.

Trees. Young branchlets densely yellowish brown villous, glabrescent. Petiole ca. 5 cm; leaf blade ovate-elliptic, 12-24 × 7-12 cm, leathery, abaxially densely yellowish brown stellate villous, adaxially glabrous or nearly glabrous; basal veins 5, base rounded or nearly obliquely cordate, apex shortly acuminate. Inflorescence racemose, clustered subapically on branchlets, produced simultaneously with new leaves, minutely yellowish brown villous. Pedicels 1-1.5 cm. Calyx dark red, ca. 1 cm, divided nearly to base, lobes linear-lanceolate, abaxially pubescent, adaxially glabrous. Androgynophore ca. 2 mm. Ovary ovoid, densely hairy; style curved, villous. Follicle red when mature, oblong or oblong-ovate, 6-10 × ca. 3 cm, abaxially densely stellate villous, apex acuminate into beak. Seeds black, ovoid, ca. 2 cm.

SW Guangxi, S Guizhou, Xizang, SW Yunnan (Tengchong).

● Dense forests, forests on rocky slopes; ca. 2000 m.