貢山柳檢視原始碼討論檢視歷史
貢山柳 |
中文名:貢山柳 學 名:Salix fengiana C. F. Fang et Ch. Y. Yang 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:楊柳目 科:楊柳科 屬:柳屬 種:貢山柳 |
貢山柳(gòng shān liǔ,學名 Salix fengiana C. F. Fang et Chang Y. Yang),是柳屬植物,生於海拔3500-3700米的山坡灌叢中,灌木,高至1.5米。一年生枝紫黑色,無毛;當年生枝密被灰色柔毛。芽卵圓形,被絨毛。葉倒卵形或長圓狀倒卵形。 [1]
貢山柳形態特徵
灌木,高至1.5米。一年生枝紫黑色,無毛;當年生枝密被灰色柔毛。芽卵圓形,被絨毛。
葉倒卵形或長圓狀倒卵形,長4-8厘米,寬3-4厘米,先端鈍圓,具斜突尖,邊緣全緣,稀長枝葉在中部以上具疏圓齒,基部圓形,闊楔形或楔形,上面綠色,被柔毛,沿葉脈尤密,下面蒼白色,沿中脈下部有柔毛;葉柄長5-6毫米,密被灰絨毛。
花與葉同時或葉後開放,花序梗長2-3厘米,密被灰絨毛,具3-4枚正常小葉;苞片長圓形或圓狀倒卵形,長及子房一半,黃褐色,先端鈍圓或幾截形,外面被柔毛,內面幾無毛;腺體2,腹生和背生,後者常較小;
雄花序長4-5厘米,粗1厘米以上;
雄蕊2,花葯黃色,卵圓形,花絲離生,長5-6毫米,約達4/5處被長柔毛;雌花序長4-8厘米,粗約1厘米;子房卵狀圓錐形,無柄,密被灰白色絨毛,花柱2裂至中部,柱頭淺至中裂。
蒴果褐色,被疏絨毛。花期7月,果期10月。 [2]
Salix fengiana C. F. Fang et Ch. Y. Yang,東北林學院植物研究室彙刊, 9: 7. 1980.
Shrubs to 1.5 m tall. One-year-old branchlets purplish black, glabrous; juvenile branchlets densely gray downy. Buds ovoid, tomentose. Petiole 5-6 mm, tomentose; leaf blade obovate or oblong-obovate, 4-8 × 3-4 cm, abaxially pale, pubescent along midvein, downy, adaxially green, downy, base rounded, broadly cuneate, or cuneate, margin entire, on long shoots remotely crenate distally, apex obtuse-rounded and obliquely apiculate. Flowering coetaneous or serotinous. Male catkin terminal, cylindric, 4-5 cm; peduncle 2-3 cm, gray tomentose, with 3 or 4 leaflets; bracts yellowish brown, oblong or orbicular-obovate, ca. 1/2 as long as ovary, abaxially downy, adaxially subglabrous, apex obtuse-rounded or nearly truncate. Male flower: adaxial gland usually larger than abaxial gland; stamens 2; filaments distinct, 5-6 mm, villous nearly throughout, downy. Female catkin 4-8 × ca. 1 cm. Female flower: ovary ovoid-conical, grayish white tomentose, sessile; style cleft; stigma 2-lobed-cleft. Capsule brown, sparsely tomentose. Fl. Jul, fr. Oct.
貢山柳生長環境
生長於海拔3500-3700米的山坡灌叢中。