樹黃耆
| 樹黃耆 |
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中文學名:樹黃耆 拉丁學名:Astragalus dendroides Kar. et Kir. 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:豆目 科:豆科 屬:黃芪屬 種:樹黃耆 |
樹黃耆（shù huáng qí，學名：Astragalus dendroides Kar. et Kir.）為豆科黃芪屬的植物。分布在中亞、哈薩克斯坦以及中國大陸的新疆等地，生長於海拔1,100米的地區，多生長于山地陽處草地中。 [1]
目錄
樹黃耆形態特徵
灌木，高達1米，樹皮灰褐色。幼枝密被白、黑色伏貼毛。羽狀複葉有9-15片小葉，長3-7厘米，被白色伏貼毛，有短柄；托葉披針形，長5-7毫米，下部與葉柄貼生，有毛；
小葉倒卵圓形或橢圓形，長8-17（25）毫米，先端鈍圓，具短芒尖，兩面疏被伏貼毛或上面近無毛 。
總狀花序塔形，花密接排列；總花梗長3-14厘米，被黑、白色伏貼毛；苞片線狀鑽形，被黑色毛；花萼初期管狀，後膨大成卵圓形，喉部收縮，長10-13毫米，被白、黑色毛，萼齒線狀鑽形，長2-2.5毫米；
花冠淡藍紫色（干後變暗黃色），旗瓣長17-25毫米，瓣片長圓形，先端微凹，中部縊縮，下部寬楔形，瓣柄不明顯，翼瓣長15-20毫米，瓣片寬線狀長圓形，瓣柄較瓣片長，龍骨瓣長14-16毫米，瓣片近倒卵形，先端微尖，長約為瓣柄的1/2。
莢果長圓形，長9-11毫米，革質，兩側扁平，假2室，被黑色短毛和白色密的長綿毛。花期6-7月，果期7-8月。 [2]
Plants subshrubby, up to 100 cm tall, covered with mostly appressed and ± medifixed hairs 0.5-1(-1.2) mm. Stems in parts of current year densely to rather densely covered with appressed white hairs, at nodes sometimes also with some black hairs. Leaves 3-9 cm; stipules 5-8(-10) mm, adnate to petiole for 2-3 mm, loosely to rather densely white and black hairy; petiole 0.4-1.2 cm, like rachis loosely white hairy; leaflets in 4 or 5(or 6) pairs, (5-)10-20 × (3-)4-11 mm, abaxially loosely to rather densely hairy, adaxially glabrous or sparsely hairy, rarely loosely appressed hairy. Racemes shortly cylindric, 3-7 cm, densely many flowered; peduncle 3-14 cm, loosely covered with white hairs, toward raceme increasingly black hairy; bracts 4-7(-8) mm, with mostly subbasifixed to basifixed black and sometimes a few white hairs. Calyx 10-13 mm, during anthesis becoming inflated ovoid, at least up to 15 mm and up to 7 mm in diam., loosely to rather densely covered with subbasifixed to basifixed, nearly straight, ascending, white hairs up to 1.8 mm and with much shorter, symmetrically or asymmetrically bifur-cate, flexuous, subappressed, black hairs; teeth 2-2.5 mm. Pet-als greenish yellow; standard oblong, 17-25 × ca. 6 mm, slightly constricted in lower part, apex slightly emarginate; wings 16-18 mm; keel 13-15 mm. Legumes sessile, included in calyx, 9-11 mm, ca. 4 mm high and ca. 2.5 mm wide, with a beak up to 2 mm, 2-locular; valves densely covered with as-cending to spreading, basifixed, white hairs up to 2 mm and sit-ting on indistinct tubercles and with some strongly asymmetri-cally bifurcate, spreading, partly very short, black hairs.
Steppes. Xinjiang [Kazakhstan, Kyrgyzstan, Tajikistan].
樹黃耆生長環境
生長於海拔1100米的山地陽處草地中。
樹黃耆分布範圍
樹黃耆參考文獻
樹黃耆（植物研究） 圖版89: 1-6 Astragalus dendroides Kar. et Kir. in Bull. Soc. Nat. Moscou 15: 339. 1842; Bunge in Mem. Acad. Sci. St. Petersb. VII. 15 (1): 233. 1869; Boriss. in Kom. Fl. USSR 12: 838. t. 49 (3) 1946; A. N. Vass. in Pavl. Φπ. Казахст. 5: 319. t. 40 (5). 1961; S. B. Ho in Bull. Bot. Res. 3 (4): 56. 1983; 中國沙漠植物志 2: 290. 1987.——A. komarovii Lipsky in Acta Hort. Petrop. 26: 186. 1907, pro parte.