灌叢黃耆檢視原始碼討論檢視歷史
灌叢黃耆 |
中文學名:灌叢黃耆 拉丁學名:Astragalus dumetorum Hand.-Mazz. 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:豆目 科:豆科 屬:黃耆屬 種:灌叢黃耆 分布區域:四川、 雲南等地 |
灌叢黃耆(guàn cóng huáng qí,學名:Astragalus dumetorum)為豆科黃芪屬的植物,是中國的特有植物。多年生草本,根粗壯。分布在中國大陸的四川、雲南等地,生長於海拔3,900米的地區,常生長在山坡草地,目前尚未由人工引種栽培。 [1]
灌叢黃耆形態特徵
多年生草本。根粗壯。 莖多數,上升,高45-90厘米,有條棱,具分枝,無毛。
奇數羽狀複葉,具25-33片小葉,長10-17厘米,具短柄;托葉離生,三角狀卵形,長1-2厘米,先端尖,具緣毛;小葉橢圓形或卵狀長圓形,長5-25毫米,寬2-12毫米,先端鈍圓或具短尖頭,基部寬楔形或近圓形,上面近無毛,下面疏被白色長柔毛。
總狀花序生多數花,較密集;總花梗生上部葉腋,較葉稍短;苞片膜質,披針形,長5-7毫米;花梗長1-3毫米,被柔毛;小苞片缺;花萼鍾狀,長4-6毫米,外面疏被褐色柔毛,萼齒三角狀披針形,與萼筒近等長或稍短;
花冠淡黃色,旗瓣倒卵形,長8-10毫米,先端微凹,基部漸狹成瓣柄,翼瓣較旗瓣稍短,瓣片橢圓形,基部具短耳,瓣柄與瓣片近等長,龍骨瓣與翼瓣近等長;子房無毛,具短柄。
莢果半卵形,長8-10毫米,寬3-5毫米,兩端尖,果頸長約2毫米,近假2室。
種子少數,腎形,栗褐色,直徑約1毫米。 花期7-8月。[2]
Astragalus dumetorum Hand. -Mazz. Symb. Sin. 7: 555. 1933; Pet. -Stib. in Acta Hort. Gothob. 12: 45. 1937-1938; 中國主要植物圖說·豆科380. 1955.
Plants 30-90 cm tall, very sparsely to sometimes loosely covered with subappressed hairs 0.3-0.5 mm. Stems several, 1.5-2 mm thick, ascending, simple or with short non-flowering lateral branches, glabrous or to loosely hairy. Leaves 7-17 cm; stipules 8-15 mm, glabrous or ciliate; petiole short, like rachis very sparsely white and black hairy; leaflets in 12-16 pairs, narrowly elliptic, 5-18 × 3-8 mm, abaxially hairy at margins and at midvein or all over, adaxially glabrous, apex rounded to truncate. Racemes shortly cylindric, 3-6 cm, densely many flowered, in fruit elongated up to 15 cm; peduncle 6-11 cm, sparsely white and black hairy or subglabrous; bracts 5-8 mm, glabrous. Bracteoles sometimes present, 0.4-1 mm, like bracts soon falling. Calyx ca. 6 mm, at base densely, otherwise sparsely, or all over rather densely, white or black hairy; teeth mostly unequal, 1.5-3 mm. Petals yellow; standard widely obo-vate, 10-11 × ca. 7 mm, emarginate; wings and keel 9-10 mm. Stigma glabrous. Legumes with a stipe 6-7 mm, obliquely ellipsoid, 11-17 mm, 7-8 mm high and 3-4 mm wide, keeled ventrally, slightly grooved dorsally, with a curved beak 2-4 mm, 2-locular; valves thin, brown to blackish, glabrous.
● 3900-4400 m. Sichuan, Xizang, Yunnan.
灌叢黃耆生長環境
生長於海拔3900米的山坡草地。[3]
灌叢黃耆分布範圍
模式標本采自四川木里。