沙丘黄耆
| 沙丘黄耆 |
|
中文学名:沙丘黄耆 拉丁学名:Astragalus cognatus Schrenk 界:植物界 门:被子植物门 纲:双子叶植物纲 目:豆目 科:豆科 属:黄芪属 种:沙丘黄耆 |
沙丘黄耆（shā qiū huáng qí，学名：Astragalus cognatus Schrenk），半灌木，高35-50厘米。枝干低矮，常被沙埋；老枝扁平，通常脱落；当年生枝条多数，平展，长20-40厘米，密被灰白色伏贴短茸毛。产新疆（伊宁地区）。 [1]
目录
沙丘黄耆基本介绍
沙丘黄耆（植物研究）
沙丘黄耆形态特征
半灌木，高35-50厘米。枝干低矮，常被沙埋；老枝扁平，通常脱落；当年生枝条多数，平展，长20-40厘米，密被灰白色伏贴短茸毛。
羽状复叶有7-9片小叶，长4-10厘米；叶柄稍粗壮，密被灰白色伏贴短茸毛；托叶长2-3毫米，多少与叶柄连合；
小叶近无柄，卵圆形或狭椭圆形，先端圆钝，具短渐尖头，长5-20毫米，宽3-13毫米，两面被白色伏贴毛。
总状花序具稀疏排列的花；总花梗较叶短，被灰白色短茸毛；苞片卵圆形或卵状长圆形，长1-2毫米，被白色细毛；花萼管状钟形，长6-8毫米，密被白色伏贴毛，萼齿线状钻形，长为筒部的1/5-1/3；
花冠淡紫红色，旗瓣长13-15毫米，瓣卵状长圆形，先端微凹，基部狭，翼瓣长10-11毫米，瓣片长圆形，瓣柄与瓣片等长或稍短，龙骨瓣较翼瓣稍短，瓣片半圆形，较瓣柄稍短；子房无柄，被毛茸。[2]
荚果宽椭圆形，长6-8毫米，宽3.5-4毫米，膨大，腹缝线龙骨状凸起，背缝线平凸，薄革质，密被白色开展的毛，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; 中国沙漠植物志 2: 277. 图版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.