白背厚壳桂 bai bei hou ke gui

Trees up to 22 m tall, ca. 15 cm d.b.h. Bark gray-black. Branchlets slender, subterete, ± angled, striate, densely rusty pubescent when young but glabrate and gray-black when mature. Leaves alternate; petiole 1.2-1.5 cm, concave-convex, densely rusty pubescent; leaf blade greenish or whitish and opaque abaxially, olive-green and shiny adaxially, oblong or oblong-ovate, 5-12 × 2-4.5 cm, abaxially rusty pubescent along midrib and lateral veins, adaxially rusty pubescent only along midrib, otherwise glabrous on both surfaces, midrib and lateral veins elevated abaxially, impressed adaxially, lateral veins 5-7 pairs, transverse veins slender, connected by reticulate veinlets, base broadly cuneate to subrounded, apex shortly acuminate. Flowers unknown. Fruit globose or oblate, ca. 1.5 cm in diam., black when mature, glabrous, ca. 15-angulate when young. Fr. Aug-Feb of next year.

● Evergreen broad-leaved forests on hilly land, forested valleys; 600-1000 m. Guangdong, Guangxi, Hainan.