沙丘黃耆檢視原始碼討論檢視歷史
沙丘黃耆 |
中文學名:沙丘黃耆 拉丁學名:Astragalus cognatus Schrenk 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:沙丘黃耆 |
沙丘黃耆(shā qiū huáng qí,學名:Astragalus cognatus Schrenk),半灌木,高35-50厘米。枝幹低矮,常被沙埋;老枝扁平,通常脫落;當年生枝條多數,平展,長20-40厘米,密被灰白色伏貼短茸毛。產新疆(伊寧地區)。 [1]
沙丘黃耆基本介紹
沙丘黃耆(植物研究)
沙丘黃耆形態特徵
半灌木,高35-50厘米。枝幹低矮,常被沙埋;老枝扁平,通常脫落;當年生枝條多數,平展,長20-40厘米,密被灰白色伏貼短茸毛。
羽狀複葉有7-9片小葉,長4-10厘米;葉柄稍粗壯,密被灰白色伏貼短茸毛;托葉長2-3毫米,多少與葉柄連合;
小葉近無柄,卵圓形或狹橢圓形,先端圓鈍,具短漸尖頭,長5-20毫米,寬3-13毫米,兩面被白色伏貼毛。
總狀花序具稀疏排列的花;總花梗較葉短,被灰白色短茸毛;苞片卵圓形或卵狀長圓形,長1-2毫米,被白色細毛;花萼管狀鐘形,長6-8毫米,密被白色伏貼毛,萼齒線狀鑽形,長為筒部的1/5-1/3;
花冠淡紫紅色,旗瓣長13-15毫米,瓣卵狀長圓形,先端微凹,基部狹,翼瓣長10-11毫米,瓣片長圓形,瓣柄與瓣片等長或稍短,龍骨瓣較翼瓣稍短,瓣片半圓形,較瓣柄稍短;子房無柄,被毛茸。[2]
莢果寬橢圓形,長6-8毫米,寬3.5-4毫米,膨大,腹縫線龍骨狀凸起,背縫線平凸,薄革質,密被白色開展的毛,假2室。花期5-6月,果期7月。[3]
Astragalus cognatus C. A. Mey. in Fisch. et Mey. Enum. Pl. Nov. 1: 81. 1841; Bunge in Mem. Acad. Sci. St. Petersb. VII 15 (1): 225. 1869; Gontsch. Popov in Kom. Fl. USSR 12: 770. 1946; Gamaiun. et Fisiun in Pavl. Φπ. Казахст. 5: 292. t. 38 (2). 1961; S. B. Ho in Bull. Bot. Res. 3 (1): 67. 1983; 中國沙漠植物志 2: 277. 圖版97 (22-28). 1987.
Astragalus cognatus var. brachybotrys Trautvetter.
Plants 35-50 cm tall, subshrubby, all parts mostly very densely covered with appressed, often somewhat flexuous, only white hairs. Stems of current year very densely covered with ± medifixed hairs 0.8-1 mm. Leaves 4-10 cm; stipules 3-4 mm, appressed hairy; petiole 2-4 cm, hairy like stem; leaflets in 2 or 3(or 4) pairs, 4-15(-20) × 2-5(-8) mm, both surfaces densely covered with ± medifixed, appressed hairs ca. 1 mm. Racemes 4-10 cm, remotely 4-8-flowered; peduncle 3-6 cm, densely appressed hairy; bracts ca. 2 mm, hairy. Calyx 6-7 mm, densely covered with medifixed, flexuous, appressed hairs ca. 0.5 mm; teeth 0.5-1 mm. Petals pale violet; standard elliptic to obovate, 13-15 × 5-6 mm, apex slightly emarginate; wings 11-13 mm; keel 10-12 mm. Legumes 6-8 mm, 4-5 mm high and 3.5-4 mm wide, with a beak 1-2 mm, incompletely 2-locular; valves densely covered with tangled, ascending to spreading, ± flexu-ous, basifixed, white hairs 1-1.5 mm and with subappressed, ± medifixed, very short hairs.
沙丘黃耆產地分布
產新疆(伊寧地區)。生於半流動沙丘及固定沙丘上。哈薩克斯坦、中亞也有分布。[4]