细序柳 xi xu liu

Salix tetradenia Handel-Mazzetti.

Shrubs. Branchlets greenish brown to blackish purple, pubescent when young. Leaves petiolate; leaf blade elliptic to lanceolate, 5(-7) × ca. 2.5 cm, abaxially greenish, sometimes whitish, glabrous or only pubescent along veins, adaxially green, base rounded or rounded-cuneate, margin entire or indistinctly dentate, apex obtuse or acute; fallen leaves of previous year rust colored. Flowering precocious or coetaneous. Catkins erect, ca. 6 cm × 3-5 mm; peduncle with 2-5 leaflets at base; rachis pilose; bracts obovate to orbicular or apex spatulate, ca. 1 mm, glabrous or basally pilose. Male flower: adaxial gland sometimes 3- or 4-lobed, abaxial gland small; filaments ca. 2 mm, base downy; anthers yellow or partly reddish. Female flower: gland adaxial; ovary ovoid, glabrous, sessile; style short; stigma 2-lobed. Fl. Apr-May.

* Mountain slopes, valleys; 2800-3300 m. Sichuan (Kangding Xian, Yanyuan Xian), NW Yunnan