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对叶柳

中文名:对叶柳

学 名:Salix salwinensis 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

科:杨柳科Salicaceae

属:柳属Salix

种:对叶柳

分布区域:中国云南

对叶柳(duì yè liǔ,学名 Salix salwinensis Hand.-Mazz.异名:Salix salwinensis var. radinostachya  ),灌木,高1米以上。幼枝,芽都有密毛。主要分布于云南西北部(维西德钦高黎贡山)。 [1]

目录

对叶柳形态特征

灌木,高1米以上。幼枝,芽都有密毛。叶对生,披针形,4-8厘米长,1.5-2厘米宽,先端急尖或渐尖,基部楔形,或近圆形,两面都密被绒毛,有时上面毛短,下面浅绿色,全缘;叶柄短,长约3-4毫米;托叶披针形,边缘有齿。

雄花序无梗,长约3厘米,5毫米粗;雄蕊2,离生,至中部或至中部以上有柔毛;苞片倒卵形,先端近截形,外面和边缘有柔毛,内面近无毛;腺体2,背腺比腹腺稍小;雌花序圆柱形,长4-6厘米,花序梗短,长约0.5-1厘米,基部有2-4枚长圆形的小叶;

子房卵形,长约2.5毫米,无柄,密被柔毛,花柱长,2深裂,柱头2裂;苞片长圆形,先端近截形或钝,外面及边缘有长柔毛,内面近无毛,开花时与子房等长或稍长;腺体1,卵状长圆形。

蒴果长约5毫米。 [2]

Salix salwinensis Hand.-Mazz. in Sitzg. Akad. Wiss. Wien. Math.-Nat. 63: 95. 1926; id. Symb. Sin. 7: 75. t. 1: 9, 10. 1929; Hao in Fedde, Rep. Beih. 93: 94. t. 34: 68. 1936.——S. salwinensis radinostachya Hand.-Mazz. 1. c. 76. 1929.

Shrubs to more than 1 m tall. Young branchlets and buds densely pilose. Leaves opposite, stipulate, shortly petiolate; stipules lanceolate; leaf blade lanceolate or oblanceolate, 4-8 × 1.5-2 cm, abaxially tomentose, greenish, adaxially tomentose or pubescent, green, base cuneate or subrounded, margin entire, apex acute or acuminate. Male catkin sessile; bracts obovate, abaxially and marginally downy, adaxially subglabrous, apex subtruncate. Male flower: adaxial gland slightly larger than abaxial one; stamens 2, distinct; filaments downy for ca. 1/2 their length or nearly throughout. Female catkin cylindric, 4-6 cm; peduncle 5-10 mm, with 2-4 oblong leaflets; bracts oblong, as long as or slightly longer than ovary at anthesis, abaxially and marginally villous, adaxially subglabrous, apex subtruncate or obtuse. Female flower: gland adaxial, ovate-oblong; ovary ovoid, ca. 2.5 mm, downy, sessile; style long, 2-parted; stigma 2-lobed. Capsule ca. 5 mm.

对叶柳生长环境

主要生长于海拔2900-3200米的森林中。

对叶柳分布范围

主要分布于云南西北部(维西德钦高黎贡山)。模式标本采自云南西部。

参考来源

  1. 对叶柳, 植物智, 2020-01-18
  2. 《中国植物志》 第20(2)卷 (1984) >> 247页 PDF >> 对叶柳 Salix salwinensis