山地黄耆查看源代码讨论查看历史
山地黄耆 |
中文学名:山地黄耆 界:植物界 门:被子植物门 纲:双子叶植物纲 目:杜鹃花目 科:蝶形花科 属:紫云英属 种:山地黄耆 分布区域:西藏自治区 生存环境:高山草甸, 石坡, 石滩 |
山地黄耆(学名 Astragalus arnoldii Hemsl.,又名:团垫黄耆,异名:Astragalus monticola Astragalus culcitiformis Astragalus linii Astragalus roborovskyi Astragalus arnoldii f. albiflorus ),多年生垫状草本,高2-3厘米。根粗壮,木质化。茎极短缩,被密毛。 [1]
山地黄耆形态特征
多年生垫状草本,高2-3厘米。 根粗壮,木质化。茎极短缩, 被密毛。
羽状复叶有3-5片小叶,长7-10毫米;托叶合生,基部与叶柄贴生,外面密被白色毛;小叶长圆形,长3-5毫米,两面密被灰白色毛。
总状花序的花序轴短缩,生1-2花;总花梗较叶短,连同花序轴与叶近等长;苞片线形;花萼钟状,长3-4毫米,萼齿钻状,长约为萼筒的一半或与其等长;
花冠蓝色,旗瓣长8-9毫米,瓣片近圆形,先端微凹,下部渐狭成瓣柄,翼瓣长5-6毫米,瓣片长圆形,先端圆或微尖,瓣片与瓣柄等长,龙骨瓣长4-5毫米,瓣片半圆形,瓣片与瓣柄等长。
荚果长圆形,长3-5毫米,微弯,1室。[2]
花期7-8月,果期8-9月。 [3]
Astragalus arnoldii f. albiflorus Y. H. Wu; A. culcitiformis P. C. Li & C. C. Ni; A. li-nii Gómez-Sosa; A. monticola P. C. Li & C. C. Ni (1979), not Philippi (1864); A. roborovskyi N. Ulziykhutag.
Plants 3-5 cm tall, nearly acaulescent, forming compact mats; hairs appressed, mostly ± medifixed, in vegetative parts white, 0.5-1 mm. Leaves 1-2 cm; stipules 3-5 mm, adnate to petiole up to 1/2, shortly connate behind stem, loosely to densely white hairy; petiole 0.8-1.5 cm, like slender rachis rather densely hairy; leaflets in 1-3 pairs, 1-5 × 0.5-1 mm, often folded, both surfaces rather densely hairy. Racemes rather densely 4-8-flowered, somewhat elongated in fruit; peduncle 1-2.5 cm, slender, rather densely hairy; bracts 1.5-2 mm, with few black hairs. Calyx 3-4 mm, loosely to rather densely pre-dominantly black hairy; teeth 0.5-1 mm. Petals purplish to violet; standard nearly orbicular, 6-8 × 4-5 mm, apex emargi-nate; wings 6-7.5 mm; keel 5.5-6.5 mm. Legumes sessile, slightly curved, (6-)8-10 mm, strongly inflated, with a slender beak 1-1.5 mm, nearly 1-locular; valves villous with white hairs.
High alpine slopes; 4000-5500 m. Qinghai, Xinjiang, Xizang [In-dia (Sikkim), Kashmir, Nepal].
山地黄耆生长环境
生长于海拔4000-5000米的湖畔、山坡、河谷等处的砂砾地带。[4]
山地黄耆分布范围
模式标本采自我国西藏仲巴。
山地黄耆参考文献
山地黄耆(植物分类学报)
Astragalus monticola P. C. Li et Ni in Acta Phytotax. Sinca 17: 105. f. 3. 1979; S. B. Ho in Bull. Bot. Res. 3 (1): 61. 1983; 西藏植物志2: 807. 图260. 1985.