尖齿叶垫柳查看源代码讨论查看历史
尖齿叶垫柳 |
中文名:尖齿叶垫柳 学 名:Salix oreophila 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:杨柳目 科:杨柳科 属:柳属 组:青藏垫柳组 种:垫柳 变 种:尖齿叶垫柳 |
尖齿叶垫柳(学名:Salix oreophila)为杨柳科柳属的植物。分布在印度、锡金以及中国大陆的西藏、云南等地,生长于海拔4,000米至4,600米的地区,一般生长在生凌晨:高山顶部裸露的岩石上,目前尚未由人工引种栽培。 [1]
尖齿叶垫柳形态特征
垫状灌木,主干较短,暗褐色,分枝多。当年生枝红褐色,稍直立,高仅数厘米,无毛。芽卵形,先端稍尖,无毛。
叶长圆形,至倒卵形,长5-7毫米,宽2-3毫米,萌枝叶长可达8毫米,先端急尖,短渐尖或钝,基部楔形,上面绿色,无毛,中脉明显凹入,下面色稍淡,无毛,中脉明显隆起,侧脉不显,叶先端有3-5(-7)个很深的齿,近似小裂片,中部以下全缘;叶柄长约2毫米,无毛。
花序与叶同时展开,卵圆形,仅着生数花,生于当年生枝的顶端,轴有疏短柔毛;雄蕊2,花丝无毛,花药球形;苞片狭长,先端稍尖,无毛或有很疏的短柔毛,约为花丝长度的1/3;腺体2,背腺较小;
子房具短柄,无毛,花柱2裂,柱头2裂;苞片狭长,先端钝,稀有不规则的齿缺;仅有腹腺,约与子房柄等长。
花期7月,果期8月。 [2]
Salix oreophila Hook. f. apud Anderss. in Journ. Linn. Soc. 4: 57. 1860; Hook. f. Fl. Brit. Ind. 5: 635. 1888; Schneid. in Sarg. Pl. Wils. 3: 146. 1916; Hao in Fedde, Rep. Beih. 93: 49. 1936;西藏植物名录, 47. 1980.
Shrubs cushion-shaped, to 3 cm tall; trunk dull brown, short, much branched. Juvenile branchlets slightly erect, russet, glabrous. Leaf blade oblong to obovate, 5-7 × 2-3 mm, to 8 mm on shoots, adaxially greenish, glabrous, base cuneate, margin with 3-5(-7) coarse teeth (teeth lobulelike distally, entire proximally), apex acute, shortly acuminate, obtuse, or rounded-truncate and 3-5-dentate; midvein raised adaxially. Flowering coetaneous. Catkins terminal, capitate, few flowered; bracts narrowly elongate, glabrous or pilose, margin rarely irregularly dentate, apex acute, obtuse, or subrounded. Male flower: adaxial gland larger than abaxial gland; stamens 2; filaments glabrous, ca. 3 × as long as bracts; anthers globose. Female flower: adaxial gland ca. as long as stipe; ovary glabrous, shortly stipitate or sessile; style cleft; stigma 2-lobed. Fl. Jul, fr. Aug.
尖齿叶垫柳生长环境
生长于海拔4000-4600米的高山顶部裸露的岩石上。