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黄花垫柳 |
中文名:黄花垫柳 学 名:Salix souliei Seemen 界:植物界 门:被子植物门Angiospermae 纲:双子叶植物纲Dicotyledoneae 目:杨柳目 Salicales 科:杨柳科Salicaceae 属:柳属Salix 种:黄花垫柳 分布区域:中国四川、 |
黄花垫柳,是柳属植物,垫状灌木,干匍匐,伸长,暗褐色,生有不定根。当年生枝红褐色,无毛或有疏白柔毛。芽小,广卵形,先端钝。 [1]
黄花垫柳形态特征
垫状灌木,干匍匐,伸长,暗褐色,生有不定根。当年生枝红褐色,无毛或有疏白柔毛。芽小,广卵形,先端钝。
叶椭圆形或卵状椭圆形,长8-13毫米,宽4-6毫米,萌枝叶长可达2.7厘米,宽可达1.2厘米,先端钝,基部楔形或钝,革质,上面亮绿色,具皱纹,无毛,中脉凹下,下面苍白色,或有白粉,幼时密生白色长柔毛,后无毛,中脉明显隆起,侧脉不显,全缘;叶柄长4-7毫米,幼时有毛。
花序与叶同时展开,椭圆形,少花,着生于当年生枝的顶端,轴有疏柔毛;雄蕊2,花丝无毛,花药卵圆形,黄色;
苞片长圆形,黄绿色,先端钝圆,约为雄蕊长的1/2,生有疏缘毛或无毛;有腹腺和背腺,短圆柱形;
子房卵形,有短柄,无毛,花柱短,2裂,柱头长圆形,2裂;苞片长圆形,先端圆,无毛或有疏缘毛,仅具腹腺,短圆柱形,约为苞片长的1/3,稀具1小背腺。
蒴果长达3毫米。花期6月,果期7-8月。 [2]
Salix souliei Seemen in Fedde, Rep. 3: 23. 1906; Schneid. in Sarg. Pl. Wils. 3: 62. 1916; Hao in Fedde, Rep. Beih. 93: 52. t. 7: 14. 1936; H. Ohashi, Fl. East. Himal. 15 (third Rep.). 1975, pro syn. S. lindleyana Wall. apud Ariderss.; 西藏植物名录, 49. 1980.
Shrubs cushion-shaped; trunk dull brown, creeping. Juvenile branchlets russet, glabrous or sparsely white downy. Buds broadly ovoid, small. Petiole 4-7 mm, pilose when young; leaf blade elliptic or ovate-elliptic, 0.8-1.3 cm × 4-6 mm, to ca. 2.7 × 1.2 cm on shoots, leathery, abaxially pale or pruinose, densely white villous when young, glabrescent, adaxially bright green, wrinkled, glabrous, base cuneate or obtuse, margin entire, apex obtuse; midvein raised abaxially. Flowering coetaneous. Catkins terminal, ellipsoid, few flowered; rachis sparsely downy; bracts yellowish green, oblong, sparsely ciliate or glabrous, apex obtuse or rounded. Male flower: glands 2, shortly cylindric; stamens 2, glabrous, ca. 2 × as long as bracts; anthers yellow, ovoid. Female flower: adaxial gland ca. 1/3 as long as bracts, abaxial gland sometimes present, small; ovary ovoid, glabrous, shortly stipitate; style short, 2-cleft; stigma oblong, 2-lobed. Capsule to 3 mm. Fl. Jun, fr. Jul-Aug.
黄花垫柳生长环境
黄花垫柳生长于海拔4200-4800米的高山草地或裸露岩石上。模式标本采自四川康定。