扁序黄耆
扁序黄耆 |
中文学名:扁序黄耆 拉丁学名:Astragalus compressus Ledeb. 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 Archichlamydeae 目:豆目 亚 目:蔷薇亚目 Rosineae 科:豆科 亚 科:蝶形花亚科 Papilionoideae 族:山羊豆族 TRIB. Galegeae 属:黄芪属 亚 属:裂萼亚属 Subgen. Cercidothrix 种:扁序黄耆 组:剑叶组 Sect.Xiphidium |
扁序黄耆(biǎn xù huáng qí,学名:Astragalus compressus Ledeb.)是豆科黄芪属的植物。分布于西西伯利亚、哈萨克斯坦以及中国大陆的甘肃、新疆等地,生长于海拔500米至1,200米的地区,一般生长在荒漠草甸、沙地、干旱坡地、沙砾地、冲积扇、沙丘及粘土戈壁。 [1]
目录
扁序黄耆形态特征
多年生草本或半灌木,高6-30 厘米。 茎丛出,基部近木质化;枝被灰色伏贴毛。
羽状复叶有7 (9) 片小叶,长1-6厘米,苍绿色;托叶卵状披针形,离生;小叶线形,先端稍尖,长4-11毫米,宽1-1.5毫米,两面被灰白色伏贴毛,下面毛较密。
总状花序的花序轴短缩,呈头状,生5-12花,排列较密,总花梗长为叶长的1.5-4倍,被白色伏贴毛;苞片较花梗稍长,披针形,被黑、白色毛;
花萼管状,长8-10毫米,被黑色伏贴毛并混生较长的白色毛,萼齿狭披针形,长约1-1.5毫米;
花冠紫红色,旗瓣狭倒卵形,长16-22毫米,宽6-8毫米,顶端微凹,近基部渐狭,翼瓣长17-18毫米,瓣片长圆形,顶端微凹,较瓣柄稍短,龙骨瓣较翼瓣稍短,瓣片半圆形,长为瓣柄的2/3;子房无柄,线形,被伏贴毛。
荚果线形,长20-28毫米,宽1-3毫米,先端渐尖,密被白、黑伏贴毛,假2室。 花期5月,果期6月。 [2]
Astragalus compressus Ledeb. Fl. Alt. 3: 304. 1831; Gontsch. et Popov in Kom. Fl. USSR 12: 692. 1946; Gamaiun. et Fisjun in Pavl. Φπ. Казахст. 5: 254. t. 33 (6). 1961; S. B. Ho in Bull. Bot. Res. 3 (1): 65. 1983; 中国沙漠植物志2: 271. 图版95 (19-24). 1987.
Plants 6-30 cm tall. Stems several, ligneous at base, pros-trate to erect, branched, parts of current year 1-12 cm, very densely covered with medifixed, appressed, white hairs 0.6-0.8 mm. Leaves 1-5 cm, subsessile or petiole up to 1 cm, with rachis hairy like stem; stipules ca. 2 mm, very shortly adnate to petiole, white hairy; leaflets in 3(or 4) pairs, linear, 4-15(-20) × 1-1.5 mm, abaxially rather densely and adaxially loosely covered with medifixed, appressed hairs ca. 1 mm. Racemes 2.5-3 cm, 5-12-flowered; peduncle 4-6(-20) cm, hairy like stem; bracts 1-1.5 mm, black and white hairy. Calyx 8-10 mm, covered with medifixed hairs, at dorsal side with predominantly appressed black hairs 0.3-0.5 mm and at ventral side with subappressed to ascending, longer, predominantly white hairs, sometimes all over with white hairs; teeth 0.5-1.5 mm. Petals lilac-purple; standard obovate, 18-22 × 7-9 mm, apex emargi-nate; wings 17-20 mm; keel 15-17 mm. Legumes 12-28 mm, 2-3 mm high and ca. 1.5 mm wide, shortly acuminate; valves densely covered with symmetrically or asymmetrically bifur-cate, subappressed to slightly or partly distinctly ascending, white hairs 0.4-0.8 mm, with some black hairs mixed in.
Sandy and gravelly soil near rivers and lakes. Gansu, Xinjiang [Kazakhstan, Russia (Siberia)].
扁序黄耆生长环境
生长于海拔500米至1,200米的地区,一般生长在荒漠草甸、沙地、干旱坡地、沙砾地、冲积扇、沙丘及粘土戈壁。[3]