川桑 chuan sang

Trees 9-15 m tall; dioecious. Bark grayish brown. Branches spreading, subglabrous. Winter buds ovoid, ca. 8 mm, subglabrous. Petiole 2-3 cm, glabrous; leaf blade ± orbicular, 7-15 × 6-12 cm, abaxially pale green and glabrous or pubescent along midvein and lateral veins, adaxially dark green, glabrous, and slightly coarse, base ± cordate, margin narrowly triangular serrate and without subulate apiculum or seta, apex shortly acuminate to obtuse; basal lateral veins 2 and extending to 2/3 of leaf blade length, secondary veins 4-6 on each side of midvein and joined together near margin. Inflorescences axillary. Male catkins green, paired, 4-5 cm. Female inflorescences cylindric, 3-4 cm, densely flowered; peduncle 3-4.5 cm. Female flowers: calyx lobes glabrous or adaxially sparsely pubescent, margin membranous; ovary ovoid, declinate, ± compressed, pubescent; style long; stigma abaxially papillate. Syncarp white when mature, 3.5-4 cm. Fl. Apr-May, fr. May-Jun.

* Evergreen broad-leaved forests. Sichuan, Yunnan.