山地黃耆
山地黃耆 |
中文學名:山地黃耆 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:杜鵑花目 科:蝶形花科 屬:紫雲英屬 種:山地黃耆 分布區域:西藏自治區 生存環境:高山草甸, 石坡, 石灘 |
山地黃耆(學名 Astragalus arnoldii Hemsl.,又名:團墊黃耆,異名:Astragalus monticola Astragalus culcitiformis Astragalus linii Astragalus roborovskyi Astragalus arnoldii f. albiflorus ),多年生墊狀草本,高2-3厘米。根粗壯,木質化。莖極短縮,被密毛。 [1]
目錄
山地黃耆形態特徵
多年生墊狀草本,高2-3厘米。 根粗壯,木質化。莖極短縮, 被密毛。
羽狀複葉有3-5片小葉,長7-10毫米;托葉合生,基部與葉柄貼生,外面密被白色毛;小葉長圓形,長3-5毫米,兩面密被灰白色毛。
總狀花序的花序軸短縮,生1-2花;總花梗較葉短,連同花序軸與葉近等長;苞片線形;花萼鍾狀,長3-4毫米,萼齒鑽狀,長約為萼筒的一半或與其等長;
花冠藍色,旗瓣長8-9毫米,瓣片近圓形,先端微凹,下部漸狹成瓣柄,翼瓣長5-6毫米,瓣片長圓形,先端圓或微尖,瓣片與瓣柄等長,龍骨瓣長4-5毫米,瓣片半圓形,瓣片與瓣柄等長。
莢果長圓形,長3-5毫米,微彎,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].
山地黃耆生長環境
生長於海拔4000-5000米的湖畔、山坡、河谷等處的砂礫地帶。[4]
山地黃耆分布範圍
山地黃耆參考文獻
山地黃耆(植物分類學報)
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. 圖260. 1985.