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亚东毛柳 |
中文名:黑龙江 学 名:Salix yadongensis 界:植物界 门:被子植物门Angiospermae 纲:双子叶植物纲Monocotyledoneae 亚 纲:原始花被亚纲 Archichlamydeae 目:杨柳目 Salicales 科:杨柳科 Salicaceae 属:柳属 Salix 组:紫枝柳组 Sect. Heterochromae 种:亚东毛柳 分布区域:中国西藏 |
亚东毛柳(学名:Salix yadongensis),为双子叶植物纲、杨柳科、柳属的植物,为中国的特有植物。分布在中国大陆的西藏等地,生长于海拔2,820米的地区,常生长在河边,目前尚未由人工引种栽培。 [1]
亚东毛柳形态特征
灌木或小乔木。当年生幼枝密被绒毛,微褐绿色。叶椭圆形或长圆状椭圆形,长5-7厘米,宽约2(-3)厘米,先端急尖,基部圆形,上面草绿色,下面发白色,多少有毛,或仅中脉有毛,边缘有不明显的锯齿,或全缘;叶柄短,有绒毛,托叶卵形。
花序圆柱形,长4-5厘米,粗约1厘米,有长的花序梗,着生(3-) 5个小叶;子房微长圆状卵形,具疏柔毛,花柱长为子房的1/3-1/2,有长柄; 苞片倒卵形,先端截形,常具不规则的牙齿,近无毛,或仅外面基部有柔毛和疏缘毛; 腺1,腹生,条形,比子房柄稍短或等长。[2]
花期5月下旬-6月上旬。
Salix yadongensis N. Chao,植物分类学报, 17 (4): 106. 图4: 12. 1979; 西藏植物名录, 49. 1980.
Salix bhutanensis Floderus var. yadongensis (N. Chao) N. Chao.
Shrubs or small trees. Juvenile branchlets densely tomentose, slightly brownish green. Stipules ovate; petiole short, tomentose; leaf blade elliptic or oblong-elliptic, 5-7 × 2(-3) cm, abaxially whitish, ± pilose, at least along midvein, adaxially grass green, base rounded, margin entire or indistinctly serrate, apex acute. Male catkin unknown. Female catkin terete, 4-5 × ca. 1 cm; peduncle long, with 3-5 leaflets; bracts obovate, pilose only abaxially at base, margin usually irregularly dentate, apex truncate. Female flower: adaxial gland shortly ligulate, ca. as long as or shorter than stipe; ovary cylindric-ovoid, pilose, long stipitate; style 1/3-1/2 as long as ovary. Fl. May-Jun.
- Riversides; circa 2800 m. S Xizang (Yadong Xian)
Similar to Salix trichocarpa but bracts obovate, base pilose abaxially, margin usually irregularly dentate, ciliate, apex truncate; style shorter; ovary oblong-ovoid.
亚东毛柳生长环境
生长于海拔2820米的河边。
亚东毛柳分布范围
主要产自中国西藏。