秦柳 qin liu

Trees to 7 m tall. Branchlets dull purple, glabrous. Stipules ovate or obliquely ovate; petiole ca. 1.3 cm, distal part glandular or not, glabrous; leaf blade lanceolate or narrowly lanceolate, 7-10 × 1.7-2 cm, abaxially pale glabrous, adaxially green, base cuneate, margin glandular serrate, apex acute or acuminate. Flowering serotinous. Male catkin ca. 3 cm × 6 mm, loosely flowered; peduncle with 2 or 3(-5) leaflets; rachis white villous, bracts narrowly ovate, ca. 1.7 mm, abaxially glabrous, adaxially villous. Male flower: adaxial and abaxial glands connate at base, forming 4 lobes, discoid; stamens (3 or)4(-6); filaments sparsely downy at base, ca. 2 × as long as bracts. Female catkin ca. 4 cm, to 10 cm in fruit; peduncle long, with 2 or 3 leaflets; rachis pilose; bracts with both surfaces sparsely downy or abaxially subglabrous. Female flower: adaxial gland cylindric or subsquare; ovary ellipsoid-cylindric or ellipsoid, rarely ovoid, glabrous, long stipitate; style indistinct; stigma 3-lobed. Fl. Jul, fr. Jul-Aug.

* Near water; 2600-3100 m. SE Gansu, E Qinghai