銀毛果柳檢視原始碼討論檢視歷史
銀毛果柳 |
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。