藏西黃耆檢視原始碼討論檢視歷史
| 藏西黃耆 |
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中文學名:藏西黃耆 拉丁學名:Astragalus webbianus Grah. ex Benth. 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:薔薇目 亞 目:薔薇亞目 科:豆科 亞 科:蝶形花亞科 族:山羊豆族黃耆亞族 屬:黃耆屬 亞 屬:華黃耆亞屬 組:短縮莖組 |
藏西黃耆（zàng xī huáng qí，學名：Astragalus webbianus Grah. ex Benth.）是豆科黃芪屬的植物。分布在巴基斯坦、印度以及中國大陸的西藏等地，生長於海拔4,200米至4,600米的地區，一般生於河邊礫石地。 [1]
藏西黃耆形態特徵
半灌木，高15-20厘米。根粗壯，直伸。 莖短縮，基部木質化，被殘存的葉柄和葉軸。
奇數羽狀複葉，具31-51片小葉，長14-17厘米；葉柄與葉軸近等長，散生白色柔毛；托葉膜質，基部與葉柄貼生，披針形，長8-10毫米，下面散生白色長柔毛或近無毛；小葉卵形或長圓形，長4-10毫米，寬2-4毫米，先端鈍或微凹，基部寬楔形或近圓形，上面無毛或近無毛，下面散生白色柔毛，具長約1毫米的短柄。
總狀花序生2-4花，稍稀疏；總花梗腋生，長1-2厘米；苞片膜質，線形，長8-12毫米，下面散生白色或混有黑色長柔毛；花梗長4-5毫米，散生柔毛；花萼管狀，長15-18毫米，散生白色柔毛或混有黑色柔毛，萼齒線狀披針形，長4-5毫米；
花冠黃色，旗瓣長22-25毫米，寬約10毫米，先端微凹，基部漸狹，翼瓣較旗瓣短，長20-23毫米，瓣片長圓形，寬約3毫米，基部具短耳，瓣柄細，與瓣片近等長，龍骨瓣較翼瓣稍短，瓣片半卵形，較瓣柄稍短；子房狹卵形，無毛，近無柄。
莢果長圓形，長15-20毫米，無毛，近假2室；種子多數。[2] 花期6-7月。 [3]
Astragalus webbianus Grah. ex Benth. in Roy. III. Bot. Himal. 3: 199. 1835; Baker in Hook. f. Fl. Brit. Ind. 2: 132. 1876; Sven Hedin, S. Tibet 6 (3): 60. 1922; Ali in Nasir et Ali, Fl. W. Pakist. 100: 156. 1977; 西藏植物志2: 832. 圖272 (1-9). 1985.
Astragalus minutofoliolatus Wendelbo.
Plants subshrubby, acaulescent to shortly caulescent, with white hairs 0.3-0.7(-1) mm, inflorescence also with black hairs. Stems, if present, up to 5 cm. Leaves 8-22 cm; stipules distinctly longitudinally nerved, 10-15 mm, adnate to petiole for 3-5 mm, lower ones ciliate and often hairy at base, upper hairy, often connate around petiole for 1-3 mm; petiole 3-6 cm, like rachis sparsely to loosely covered with ascending hairs up to 1 mm, toward end of vegetation period hardening and often spiny, persistent to next year or even longer; leaflets in 17-23 pairs, elliptic to obovate, 2-9 × 1-4.5 mm, abaxially and at margins sparsely ± appressed hairy, adaxially glabrous, apex rounded to slightly retuse. Racemes 2-5-flowered; peduncles several, 0.5-1.5 cm, appressed hairy; bracts 8-10 mm, with white and also black hairs. Bracteoles often present, up to 2 mm. Calyx 15-17 mm, sparsely to rather densely covered with ascending white and blackish to black hairs; teeth 4-8 mm. Pet-als yellow; standard obovate, 24-27 × 9-11 mm, apex emar-ginate; wings 22-23 mm; keel 19-21 mm. Legumes with a stipe 3-4 mm, 20-25 mm, 5-6 mm high and 8-10 mm wide, nar-rowly grooved ventrally and dorsally, with a straight beak 3-4 mm, 2-locular; valves glabrous.
Moraines, among debris in alpine zone; 3600-5000 m. Xizang [Afghanistan, India, Kashmir, Pakistan].
藏西黃耆生長環境
生長於海拔4200-4600米的河邊礫石地。[4]