紫枝柳Salix heterochroma Seemen

别名：山柳;旱杨柳;黄皮柳;山杨柳;紫柳;变色柳;火杨柳;

科名：杨柳科 Salicaceae

属名：柳属 Salix

《中国植物志》第20(2)卷267页
  159．紫枝柳（中国树木分类学）
  Salix heterochroma Seemen in Bot. Jahrb. 21 (Beibl. 53): 56. 1896; et 1. c. 36 (Beibl. 82): 30. 1905; Schneid. in Sarg. Pl. Wils. 3: 62. 1916; Rehd. in Journ. Arn. Arb. 4: 142. 1923.陈嵘; 中国树木分类学, 128. 1937;中国高等植物图鉴, 1: 367. 图734. 1972; 秦岭植物志, 1 (2): 40. 1974——S. henryi Burkill in Journ. Linn. Soc. Bot. 26: 530. 1899.

《Flora of China》 Vol. 4 (1999)
Salix heterochroma  Seemen
紫枝柳   zi zhi liu
Shrubs or trees to 10 m tall. Branches dull purplish red or yellowish brown, at first downy, glabrescent. Petiole 0.5-1.5 cm; leaf blade elliptic to lanceolate or ovate-lanceolate, 4.5-10 × 1.5-2.7 cm, abaxially pruinose, sparsely silky, adaxially dull green, base cuneate, margin entire or remotely serrulate, apex acuminate or acute. Male catkin 3-5.5 cm, subsessile; rachis sericeous; bracts yellowish brown, oblong, silky villous and ciliate, or glabrous and sparsely long ciliate. Male flower: gland adaxial, long ovate or obovate, 1/2-2/3 as long as bract; stamens 2; filaments sparsely downy, ca. 3 × as long as bracts; anthers yellow, ovoid-oblong. Female catkin cylindric, to 6-10 cm in fruit; peduncle ca. 1 cm; rachis downy; bracts lanceolate to elliptic, pilose. Female flower: adaxial gland long ovate, 1/3-1/2 as long as bracts; ovary ovoid-cylindric, pilose or glabrous, stipitate; style ca. 1/3 as long as ovary; stigma 2-cleft. Capsule ovoid-oblong, ca. 5 mm, gray pubescent, apex acute. Fl. Apr-May, fr. May-Jun.
* Mountain slopes, margins of woods, valleys; 1400-2100 m. Gansu, Hubei, Hunan, Shaanxi, Sichuan, Yunnan.