扁序黃耆
| 扁序黃耆 |
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中文學名:扁序黃耆 拉丁學名:Astragalus compressus Ledeb. 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 Archichlamydeae 目:豆目 亞 目:薔薇亞目 Rosineae 科:豆科 亞 科:蝶形花亞科 Papilionoideae 族:山羊豆族 TRIB. Galegeae 屬:黃芪屬 亞 屬:裂萼亞屬 Subgen. Cercidothrix 種:扁序黃耆 組:劍葉組 Sect.Xiphidium |
扁序黃耆（biǎn xù huáng qí，學名：Astragalus compressus Ledeb.）是豆科黃芪屬的植物。分布於西西伯利亞、哈薩克斯坦以及中國大陸的甘肅、新疆等地，生長於海拔500米至1,200米的地區，一般生長在荒漠草甸、沙地、乾旱坡地、沙礫地、沖積扇、沙丘及粘土戈壁。 [1]
目錄
扁序黃耆形態特徵
多年生草本或半灌木，高6-30 厘米。 莖叢出，基部近木質化；枝被灰色伏貼毛。
羽狀複葉有7 (9) 片小葉，長1-6厘米，蒼綠色；托葉卵狀披針形，離生；小葉線形，先端稍尖，長4-11毫米，寬1-1.5毫米，兩面被灰白色伏貼毛，下面毛較密。
總狀花序的花序軸短縮，呈頭狀，生5-12花，排列較密，總花梗長為葉長的1.5-4倍，被白色伏貼毛；苞片較花梗稍長，披針形，被黑、白色毛；
花萼管狀，長8-10毫米，被黑色伏貼毛並混生較長的白色毛，萼齒狹披針形，長約1-1.5毫米；
花冠紫紅色，旗瓣狹倒卵形，長16-22毫米，寬6-8毫米，頂端微凹，近基部漸狹，翼瓣長17-18毫米，瓣片長圓形，頂端微凹，較瓣柄稍短，龍骨瓣較翼瓣稍短，瓣片半圓形，長為瓣柄的2/3；子房無柄，線形，被伏貼毛。
莢果線形，長20-28毫米，寬1-3毫米，先端漸尖，密被白、黑伏貼毛，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; 中國沙漠植物志2: 271. 圖版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)].
扁序黃耆生長環境
生長於海拔500米至1,200米的地區，一般生長在荒漠草甸、沙地、乾旱坡地、沙礫地、沖積扇、沙丘及粘土戈壁。[3]