《中国植物志》|| 杨柳科 SALICACEAE ||紫枝柳组 Sect. Heterochromae Schneid. ||毛果柳 Salix trichocarpa C. F. Fang

162．毛果柳（植物分类学报）图版77：4
Salix trichocarpa C. F. Fang,植物分类学报, 17 (4): 106. 图4: 10-11. 1979.
小乔木，高达5米。当年生幼枝密被绒毛。叶长圆状椭圆形，长5-8厘米，宽2-3厘米，先端急尖，基部圆形，上面草绿色，下面发白色，多少有毛，或仅中脉有毛，侧脉不明显，边缘有极不明显的细锯齿，或近全缘；叶柄短，长3-6毫米，有绒毛；托叶卵形。花序与叶同时开放，圆柱形，长6-8厘米，粗约1厘米，有长花序梗，其上着生5小叶，轴有柔毛；苞片小、椭圆形，外面密被长毛；子房卵状圆锥形，有柔毛，花柱长达子房的一半以上，柱头2裂，有子房柄，与腹腺近等长；腹腺1，条形。蒴果狭卵状圆锥形，长达5毫米。花期5月下旬-6月上旬，果期6月中、下旬。
产我国西藏。生于海拔3200米的山谷中。模式标本采自吉隆县色马。
本种与藏紫枝柳S. paraheterochroma C. Wang et P. Y. Fu相似，但子房卵状圆锥形，花柱长，叶长圆状椭圆形，基部圆形，边缘锯齿不明显。又与亚东毛柳S. yadongen sis N. Chao; 毛柄柳S. lasiopes C. Wang et P. Y. Fu;喜马拉雅山柳S. himalayensis (Anderss.) Flod.及其变种var. filistyla (C. Wang et P. Y. Fu) C. F. Fang在习性，叶形、色泽及枝、叶毛被情况颇相似，主要区别为子房卵状圆锥形，被密柔毛；苞片外面有长毛，内面无毛；仅1腹腺。

《Flora of China》|| Salicaceae || Salix ||毛果柳 Salix trichocarpa

179. Salix trichocarpa C. F. Fang in C. Wang & C. F. Fang, Acta Phytotax. Sin. 17(4): 106. 1979.

毛果柳 mao guo liu

Trees to 5 m tall. Juvenile branchlets tomentose. Stipules ovate; petiole 3-6 mm, tomentose; leaf blade oblong-elliptic, 5-8 × 2-3 cm, abaxially whitish, ± pilose, or pilose along midvein, adaxially grass green, base rounded, margin very indistinctly serrulate or subentire, apex acute; lateral veins indistinct abaxially. Flowering coetaneous. Male catkin unknown. Female catkin 6-8 × ca. 1 cm; peduncle long, with 5 leaflets; rachis downy; bracts elliptic, small, abaxially densely long pubescent, adaxially glabrous, apex rounded. Female flower: adaxial gland shortly ligulate, ca. as long as stipe; ovary ovoid-conical, downy, stipitate; style more than 1/2 as long as ovary; stigma 2-cleft. Capsule narrowly ovoid-conical, to 5 mm. Fl. Jun, fr. Jun-Jul.

* Mountain valleys; circa 3200 m. Xizang (Gyirong Xian)

Similar to Salix paraheterochroma but leaf blade oblong-elliptic, base rounded, margin indistinctly serrate; style long; ovary ovoid-conical. Similar also to S. yadongensis but bracts long pubescent abaxially, glabrous adaxially; flowers with adaxial glands only; ovary ovoid-conical, densely downy.