囊萼黃耆檢視原始碼討論檢視歷史
| 囊萼黃耆 |
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中文學名:囊萼黃耆 拉丁學名:Astragalus cysticalyx Ledeb. 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:囊萼黃耆 |
囊萼黃耆（學名：Astragalus cysticalyx Ledeb.）為豆科黃芪屬的植物。分布於哈薩克斯坦以及中國大陸的新疆等地，生長於海拔1,300米的地區，見於乾旱山坡。 [1]
囊萼黃耆形態特徵
灌木，高達60厘米。老枝灰褐色，幼枝散生白色伏貼毛。
羽狀複葉有9-11片小葉，長7-9厘米，無柄或具極短的柄；托葉長圓狀披針形，長7-9毫米，漸尖，密被白色伏貼毛和黑色毛；小葉長圓狀橢圓形，長13-25毫米，先端漸尖或鈍圓，具短尖頭，上面無毛或具散生白色伏貼毛，下面毛較密。
總狀花序卵圓形，花序軸長4-6厘米，具多數花；總花梗上部腋生，較粗壯，較葉長1.5-2倍；苞片線形，長7-9毫米，被黑、白色開展的長毛；
花萼初期管狀，長約12毫米，後膨大成球狀卵形，被白、黑色伏貼毛，萼齒線狀鑽形，長為萼筒的1/2或1/3，被較多開展的黑色毛；
花冠黃色，旗瓣長19-20毫米，瓣片倒卵狀長圓形，先端微凹，長為瓣柄的一半，龍骨瓣長15-16毫米，瓣片長圓形，長為瓣柄的1/2；子房被白色綿毛。
莢果長圓形，長約10毫米，密被開展的白毛。花期6-7月，果期7-8月。 [2]
Astragalus cysticalyx Ledeb. Fl. Ross. 1: 643. 1842; Bunge in Mem. Acad. Sci. St. Petersb. VII. 15 (1): 234. 1869; Boriss. in Kom. Fl. USSR 12: 834. 1946; A. N. Vass. in Pavl. Φπ. Казахст. 5: 317. 1961; S. B. Ho in Bull. Bot. Res. 3 (4): 57. 1983.——A. physocalyx Kar. et Kir. in Bull. Soc. Nat. Moscou 14: 409. 1841. non Fisch. 1837.
Astragalus physocalyx Karelin & Kirilov (1841), not Fischer (1837).
Plants subshrubby, up to 60 cm tall, vegetative parts sparsely covered with ± medifixed, appressed, white hairs 0.5-1 mm. Stems branched, old parts ligneous; stems of current year 7-17 cm, sparsely hairy. Leaves 6-9 cm, subsessile; stipules 5-9 mm, adnate to petiole for 1-2 mm, sparsely covered with appressed, mostly white hairs; rachis sparsely appressed hairy; leaflets in 4 or 5 pairs, 13-35 × 4-8 mm, covered with scattered hairs abaxially, glabrous adaxially. Racemes ovoid, (3.5-)4-6 × ca. 3.5 cm, densely many flowered; peduncle 8-15(-22) cm, with scattered appressed hairs; bracts 5-9 mm, with spreading black hairs. Calyx at anthesis tubular, ca. 12 mm, later enlarged, spherical-ovoid, 13-14 mm, villous, rather densely covered with ± spreading, basifixed, white hairs 1-1.5 mm and toward teeth increasingly covered with distinctly shorter, ± appressed, subbasifixed to strongly asymmetrically bifurcate, black hairs; teeth 4-5 mm. Petals dingy yellow; standard narrowly obovate, 18-20 × 5-6 mm, apex slightly emarginate; wings 19-20 mm; keel 14-17 mm. Legumes included in persistent calyx, sessile, oblong, ca. 10 mm, densely villous with ± spreading white hairs.
囊萼黃耆生長環境
生長於海拔1300米的乾旱山坡。[3]
囊萼黃耆分布範圍
分布於新疆北部（塔城一帶）哈薩克斯坦境內的準噶爾阿爾泰地區也有分布。 [4]
囊萼黃耆相關的種
與「囊萼黃耆 Astragalus cysticalyx Ledeb.」相關的種有：
樹黃耆Astragalus dendroides Kar. & Kir.
白枝黃耆Astragalus leucocladus Bunge
富蘊黃耆Astragalus majevskianus Krylov
細果黃耆Astragalus tyttocarpus Gontsch.
中亞黃耆Astragalus woldemari Juz.
黑枝黃耆（變種）Astragalus woldemari Juz. var. atrotrichocladus S. B. Ho
中亞黃耆（原變種）Astragalus woldemari Juz. var. woldemari