岩壁垫柳查看源代码讨论查看历史
| 岩壁垫柳 |
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中文名:岩壁垫柳 拉丁学名:Salix scopulicola Mao et W. Z. Li 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 种:岩壁垫柳 |
岩壁垫柳 （学名：Salix scopulicola Mao et W. Z. Li）为杨柳科，柳属的植物类。垫状灌木，高不到10厘米。主干平卧生根，枝平卧或上升；叶卵状长圆形，有乳头状突起；叶柄长1—2毫米，下面有柔毛；花序与叶同时开放，深红色，头状。花期8月。 [1]
岩壁垫柳形态特征
垫状灌木，高不到10厘米。主干平卧生根，枝平卧或上升，当年生枝被长柔毛，前一年的生枝无毛，栗褐色；芽卵形，近无毛，黄红色。
叶卵状长圆形，长4—8毫米，宽2—4毫米，先端急尖或略尖，基部钝或近圆形，上面绿色，近无毛，有乳头状突起，中脉下凹，侧脉不明显，下面幼时密被银白色柔毛，后渐脱落，略呈白色，中脉凸起，侧脉明显，约4对，全缘；叶柄长1—2毫米，下面有柔毛。
花序与叶同时开放，深红色，头状，长5毫米，径4毫米，生当年枝顶端，具6—8花；雄蕊2，花丝离生，无毛，稍长于苞片；苞片长圆形，外面疏被银白色曲柔毛，先端近圆形，有密缘毛；腺体2，腹、背腺皆瓶状，近等大，长为苞片之半。
雌花序未详。花期8月。[2]
Shrubs cushion-shaped, to. 10 cm tall; trunk creeping. Branches procumbent or decumbent; juvenile branchlets villous, 1-year-old branchlets chestnut brown, glabrous. Buds reddish, ovate, subglabrous. Petiole 1-2 mm, downy; leaf blade ovate-oblong, 4-8 × 2-4 mm, abaxially pale, dark downy when young, later glabrescent, adaxially green, subglabrous, papillate, base obtuse or rounded, margin entire, apex acute or subacute; midvein raised abaxially, impressed adaxially; lateral veins conspicuous, ca. 4 on each side of midvein abaxially, obscure adaxially. Catkins terminal on young shoots, ca. 5 cm × 4 mm, 6-8-flowered; bracts oblong, abaxially dark crisped downy at margin, apex rounded, densely ciliate. Male flower: glands adaxial and abaxial, subequal, ca. 1/2 as long as bracts; stamens 2, free; filaments glabrous, slightly longer than bracts. Female catkin unknown. Fl. Jul.
- About 4000 m. Yunnan (Gongshan Drungzu Nuzu Zizhixian: Dulong Jiang valley)
A. K. Skvortsov notes that this species is very near or possibly the same as Salix oreophila.
The name Salix hylematica C. K. Schneider var. scopulicola (Mao & W. Z. Li) N. Chao & G. T. Gong (J. Sichuan. For. Sci. Technol. 27: 10. 2006) appeared after the corresponding Flora volume.
岩壁垫柳生长环境
生海拔4000米的陡岩上。[3]