怒江矮柳
怒江矮柳 |
中文名:怒江矮柳 学 名:Salix coggygria Hand.-Mazz. 界:植物界 门:被子植物门Angiospermae 纲:双子叶植物纲Monocotyledoneae 目:杨柳目 Salicales 科:杨柳科Salicaceae 属:柳属Salix 种:矮柳 变 种:怒江矮柳 |
怒江矮柳(nù jiāng ǎi liǔ,学名 Salix coggygria Hand.-Mazz.),矮小灌木,高可达50厘米。幼枝褐色,老枝暗褐色;当年生枝被灰色或褐色绒毛,后无毛。产于云南西北部、西藏东部。 [1]
目录
怒江矮柳形态特征
矮小灌木,高可达50厘米。幼枝褐色,老枝暗褐色;当年生枝被灰色或褐色绒毛,后无毛。
芽卵形,褐色,长4-7毫米,被微毛。叶倒卵圆形,长1.5-4.5厘米,宽1.5-3.5厘米,两端钝圆,先端常有一皱褶,上面绿色,被散生短柔毛,下面苍白色,有蜡粉,幼叶上面密被锈色柔毛,下面密被白色长柔毛,后变无毛,全缘,稀在近先端处有疏锯齿;叶柄长2-5毫米,有密毛;托叶三角状卵形,有毛。
花序与叶同时展开,长2-3厘米,密花,生于当年生枝顶端,基部有数枚正常或较小的小叶,花序轴密被绒毛;雄蕊2,长6毫米,花丝中部以下有毛,花药卵球形,黄色;
苞片倒卵状长圆形,长约3毫米,先端钝或近截形,两面有疏柔毛,边缘较密;
腺体2,腹生和背生,圆柱形;子房卵形,无柄,密被灰白色毡毛,花柱明显,先端2裂,柱头2裂。花期6月,果期7月。 [2]
Salix coggygria Hand.-Mazz. Symb. Sin. 7: 79. t. 1: 5-6. 1929; Hao in Fedde, Rep. Beih. 93: 57. t. 11: 21. 1936; 西藏植物名录, 45. 1980.
Shrubs low, to 50 cm tall. Branchlets dull brown, glabrous, when young gray or brownish tomentose. Buds brown, ovoid, 4-7 mm. Stipules deltoid-ovate, pilose; petiole 2-5 mm, with dense hairs; leaf blade obovate-orbicular, 1.5-4.5 × 1.5-3.5 cm, abaxially pale, glaucous, adaxially green, when young densely white villous abaxially, glabrescent, adaxially densely rust-colored pubescent, both ends obtuse-rounded, margin entire, rarely sparsely serrate near apex, apex often with a pleated mucro. Flowering coetaneous. Catkins terminal, 2-3 cm, densely flowered, with leaflets at base; rachis tomentose; bracts obovate-oblong, ca. 3 mm, pilose, apex obtuse or subtruncate. Male flower: adaxial and abaxial glands cylindric; stamens 2, ca. 6 mm; filaments pilose proximally; anthers yellow, ovoid. Female flower: ovary ovoid, densely grayish white pubescent, sessile; style 2-cleft; stigma 2-lobed. Fl. Jun, fr. Jul.
- Among shrubs; 3400-4700 m. E Xizang, NW Yunnan
怒江矮柳生长环境
生长于海拔3400-4700米的高山地区,常与其他灌木形成高山灌丛。