畸形黃耆檢視原始碼討論檢視歷史
| 畸形黃耆 |
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中文學名:畸形黃耆 拉丁學名:Astragalus anomalus Bunge in Mem. 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 |
畸形黃耆（jī xíng huáng qí，學名：Astragalus anomalus Bunge in Mem.）為豆科黃芪屬的植物，是我國的特有植物。產我國西藏南部（吉隆、聶拉木）。生於海拔3500-4100米間的山坡草地。據資料記載，產我國西藏西部的短梗黃耆 A. candolleanus Royle et Benth. 接近本種，它與本種的區別是花序幾無總花梗，小葉數目較少等。因未見標本，故未編入。 [1]
畸形黃耆形態特徵
匍匐小灌木，高約30厘米，疏被開展的白色長柔毛，基部常殘存針刺狀的葉柄和葉軸。 莖木質化，多少短縮，節間較托葉長。
奇數羽狀複葉，具23-31片小葉，長5-12毫米，葉柄長2-4厘米；托葉膜質，基部與葉柄貼生，卵形或狹卵形，長5-12毫米，下面散生開展的白色長柔毛；小葉卵形或長圓狀卵形，長4-10毫米，寬2-5毫米，先端鈍或微凹，基部寬楔形或近圓形，上面近無毛，下面沿主脈和邊緣散生白色長柔毛，具短柄。
總狀花序生2-5花，基部集生，呈頭狀；總花梗長1-3厘米；苞片膜質，披針形，長10-12毫米；花萼管狀，長13-15毫米，密被開展的褐色長柔毛或混有白色毛，萼齒披針形，長4-6毫米；
花冠黃色，旗瓣狹倒卵形，長22-24毫米，先端鈍圓，基部漸狹成瓣柄，翼瓣較旗瓣略短，瓣片長圓形，基部具短耳，瓣柄與瓣片近等長，龍骨瓣較翼瓣短，長12-16毫米瓣片半卵形，較瓣柄短；子房狹卵形，密被白色長柔毛，具短柄。
莢果狹卵形，長達20毫米，先端具長喙，基部近無果頸，假2室。種子多數，腎形，長約2毫米。 花果期6-8月 。[2]
Astragalus anomalus Bunge in Mem. Acad. Sci. St. Petersb. VII. 15 (1): 62. 1869; Baker in Hook. f. Fl. Brit. Ind. 2: 133. 1876; 西藏植物志2: 833. 圖273. 1985.
Plants herbaceous or subshrubby, acaulescent to distinctly caulescent, white hairy, inflorescence sometimes also with black hairs. Stems, if present, up to 25 cm, spreading hairy. Leaves 5-12(-17) cm; stipules distinctly longitudinally nerved, adnate to petiole for 3-5 mm, lower ones 5-7 mm, glabrous or ciliate, upper ones 10-15 mm, mostly densely long hairy; petiole 1-3 cm, like rachis loosely to rather densely covered with ascending hairs 1-2(-2.5) mm, sometimes toward end of vegetation period hardening and persistent to next year; leaflets in 6-20(-28) pairs, elliptic to widely elliptic, 4-8(-14) × 2-5(-6) mm, mostly on both surfaces densely subappressed hairy, more rarely adaxially sparsely hairy to glabrous, very rarely hairy only at midvein abaxially, apex subacute to slightly re-tuse. Racemes subsessile (mostly in acaulescent plants) or with a hairy to subglabrous peduncle 0.5-5 cm, loosely 3-5-flow-ered; bracts 8-10 mm, hairy. Calyx 12-14(-16) mm, loosely to densely spreading white or white and black hairy; teeth 5-8 mm. Petals yellow; standard obovate, 18-23 × 8-12 mm, apex emarginate; wings 17-21 mm; keel 14-15 mm. Legumes subsessile, oblong, 10-17(-20) mm, 4-7 mm high and wide, with a straight or curved beak 3-10 mm, 2-locular; valves leathery, loosely to densely covered with spreading hairs.
Subalpine to alpine meadows and stony slopes; 1800-5000 m. Xinjiang, Xizang [Afghanistan, India, Kashmir, Nepal, Pakistan].
畸形黃耆生長環境
生長於海拔3500-4100米間的山坡草地。