銀毛果柳檢視原始碼討論檢視歷史
| 銀毛果柳 |
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中文名:銀毛果柳 學 名:Salix argyrotrichocarpa C. F. Fang 界:植物界 門:被子植物門Angiospermae 綱:雙子葉植物綱Dicotyledoneae 目:楊柳目 科:楊柳科Salicaceae 屬:柳屬Salix 種:銀毛果柳 |
銀毛果柳(yín máo guǒ liǔ，學名 Salix argyrotrichocarpa C. F. Fang)，是柳屬植物，生於海拔3900米的山坡路旁。灌木，高3米。一年生小枝粗壯，徑約5毫米，紫褐色，無毛；當年生嫩枝無毛或稍有毛，後無毛。 本種與錫金柳S. sikkimensis Anderss.相似，但本種苞片先端圓形，不為膜質，兩面密被銀白色長毛；幼葉毛少，葉緣無腺齒尖；花序梗長。又與灰葉柳S. spodiophylla Hand.-Mazz.相近，區別在於花序梗上無葉；苞片兩面有長毛；葉下面脈上無毛或微有短柔毛，葉柄無或近無。 [1]
銀毛果柳形態特徵
灌木，高3米。一年生小枝粗壯，徑約5毫米，紫褐色，無毛；當年生嫩枝無毛或稍有毛，後無毛。葉倒卵狀橢圓形，長5-7厘米，寬2.5-3厘米，先端急尖或圓形，或有小尖頭，基部楔圓形至圓形，兩面同色，或背面稍淺，上面有皺紋，幼葉微有毛，後除脈外無毛，下面無毛，邊全緣；葉柄無或近無。
僅見雌株；花先葉開放或與葉近同時開放，有花序梗，長1-2.5厘米，梗上無葉，與軸都被銀白色長柔毛，花序長6-7厘米，粗約1-1.3厘米；子房狹卵形，密被白柔毛，長約3毫米，有短柄，花柱長，約等於子房長的1/2,上部淺裂，柱頭2裂，裂片舌狀；
苞片倒卵狀長圓形，兩面密被絲質長毛，先端近圓形；僅有1腺體，腹生，近卵形。
花期7月上、中旬。 [2]
Salix argyrotrichocarpa C. F. Fang,植物分類學報, 17 (4): 107. 圖6: 1-4. 1979; 西藏植物名錄, 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.
銀毛果柳生長環境
銀毛果柳生長於海拔3900米的山坡路旁。