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贡山柳 |
中文名:贡山柳 学 名:Salix fengiana C. F. Fang et Ch. Y. Yang 界:植物界 门:被子植物门 纲:双子叶植物纲 目:杨柳目 科:杨柳科 属:柳属 种:贡山柳 |
贡山柳(gòng shān liǔ,学名 Salix fengiana C. F. Fang et Chang Y. Yang),是柳属植物,生于海拔3500-3700米的山坡灌丛中,灌木,高至1.5米。一年生枝紫黑色,无毛;当年生枝密被灰色柔毛。芽卵圆形,被绒毛。叶倒卵形或长圆状倒卵形。 [1]
贡山柳形态特征
灌木,高至1.5米。一年生枝紫黑色,无毛;当年生枝密被灰色柔毛。芽卵圆形,被绒毛。
叶倒卵形或长圆状倒卵形,长4-8厘米,宽3-4厘米,先端钝圆,具斜突尖,边缘全缘,稀长枝叶在中部以上具疏圆齿,基部圆形,阔楔形或楔形,上面绿色,被柔毛,沿叶脉尤密,下面苍白色,沿中脉下部有柔毛;叶柄长5-6毫米,密被灰绒毛。
花与叶同时或叶后开放,花序梗长2-3厘米,密被灰绒毛,具3-4枚正常小叶;苞片长圆形或圆状倒卵形,长及子房一半,黄褐色,先端钝圆或几截形,外面被柔毛,内面几无毛;腺体2,腹生和背生,后者常较小;
雄花序长4-5厘米,粗1厘米以上;
雄蕊2,花药黄色,卵圆形,花丝离生,长5-6毫米,约达4/5处被长柔毛;雌花序长4-8厘米,粗约1厘米;子房卵状圆锥形,无柄,密被灰白色绒毛,花柱2裂至中部,柱头浅至中裂。
蒴果褐色,被疏绒毛。花期7月,果期10月。 [2]
Salix fengiana C. F. Fang et Ch. Y. Yang,东北林学院植物研究室汇刊, 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.
贡山柳生长环境
生长于海拔3500-3700米的山坡灌丛中。