囊萼黃耆
囊萼黃耆 |
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]
目錄
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
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