银毛果柳
| 银毛果柳 |
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中文名:银毛果柳 学 名:Salix argyrotrichocarpa C. F. Fang 界:植物界 门:被子植物门Angiospermae 纲:双子叶植物纲Dicotyledoneae 目:杨柳目 科:杨柳科Salicaceae 属:柳属Salix 种:银毛果柳 |
银毛果柳(yín máo guǒ liǔ，学名 Salix argyrotrichocarpa C. F. Fang)，是柳属植物，生于海拔3900米的山坡路旁。灌木，高3米。一年生小枝粗壮，径约5毫米，紫褐色，无毛；当年生嫩枝无毛或稍有毛，后无毛。 本种与锡金柳S. sikkimensis Anderss.相似，但本种苞片先端圆形，不为膜质，两面密被银白色长毛；幼叶毛少，叶缘无腺齿尖；花序梗长。又与灰叶柳S. spodiophylla Hand.-Mazz.相近，区别在于花序梗上无叶；苞片两面有长毛；叶下面脉上无毛或微有短柔毛，叶柄无或近无。 [1]
目录
银毛果柳形态特征
灌木，高3米。一年生小枝粗壮，径约5毫米，紫褐色，无毛；当年生嫩枝无毛或稍有毛，后无毛。叶倒卵状椭圆形，长5-7厘米，宽2.5-3厘米，先端急尖或圆形，或有小尖头，基部楔圆形至圆形，两面同色，或背面稍浅，上面有皱纹，幼叶微有毛，后除脉外无毛，下面无毛，边全缘；叶柄无或近无。
仅见雌株；花先叶开放或与叶近同时开放，有花序梗，长1-2.5厘米，梗上无叶，与轴都被银白色长柔毛，花序长6-7厘米，粗约1-1.3厘米；子房狭卵形，密被白柔毛，长约3毫米，有短柄，花柱长，约等于子房长的1/2,上部浅裂，柱头2裂，裂片舌状；
苞片倒卵状长圆形，两面密被丝质长毛，先端近圆形；仅有1腺体，腹生，近卵形。
花期7月上、中旬。 [2]
Salix argyrotrichocarpa C. F. Fang,植物分类学报, 17 (4): 107. 图6: 1-4. 1979; 西藏植物名录, 44. 1980.
Shrubs to 3 m tall. Branchlets purplish brown, stout, ca. 5 mm in diam., glabrous; juvenile branchlets glabrous or slightly pilose, glabrescent. Leaves sessile or subsessile; leaf blade obovate-elliptic, 5-7 × 2.5-3 cm, both surfaces uniformly colored or abaxially greenish, glabrous, adaxially wrinkled, slightly pilose when young, glabrescent except along veins, base cuneate-rounded to rounded, margin entire, apex acute, rounded, or apiculate. Flowering precocious or nearly coetaneous. Male catkin unknown. Female catkin 6-7 × ca. 1.3 cm; peduncle 1-2.5 cm, without leaflets; rachis white villous; bracts obovate-oblong, both surfaces densely long silky, apex subrounded. Female flower: adaxial gland subovate; ovary narrowly ovoid, ca. 3 mm, white downy, shortly stipitate; style long, ca. 1/2 as long as ovary, 2-lobed; stigma 2-cleft. Fl. Jul.
- Mountain slopes; circa 3900 m. SE Xizang (Mêdog Xian)
Similar to Salix sikkimensis but leaf blade slightly pilose when young, margin not gland-tipped; peduncle long; bracts not membranous, densely long silky, rounded at apex. Similar also to S. spodiophylla but leaves sessile or subsessile; blade glabrous or slightly pilose along veins abaxially; peduncle without leaflets; bracts long silky.
银毛果柳生长环境
银毛果柳生长于海拔3900米的山坡路旁。