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灌丛黄耆 |
中文学名:灌丛黄耆 拉丁学名:Astragalus dumetorum Hand.-Mazz. 界:植物界 门:被子植物门 纲:双子叶植物纲 目:豆目 科:豆科 属:黄耆属 种:灌丛黄耆 分布区域:四川、 云南等地 |
灌丛黄耆(guàn cóng huáng qí,学名:Astragalus dumetorum)为豆科黄芪属的植物,是中国的特有植物。多年生草本,根粗壮。分布在中国大陆的四川、云南等地,生长于海拔3,900米的地区,常生长在山坡草地,目前尚未由人工引种栽培。 [1]
灌丛黄耆形态特征
多年生草本。根粗壮。 茎多数,上升,高45-90厘米,有条棱,具分枝,无毛。
奇数羽状复叶,具25-33片小叶,长10-17厘米,具短柄;托叶离生,三角状卵形,长1-2厘米,先端尖,具缘毛;小叶椭圆形或卵状长圆形,长5-25毫米,宽2-12毫米,先端钝圆或具短尖头,基部宽楔形或近圆形,上面近无毛,下面疏被白色长柔毛。
总状花序生多数花,较密集;总花梗生上部叶腋,较叶稍短;苞片膜质,披针形,长5-7毫米;花梗长1-3毫米,被柔毛;小苞片缺;花萼钟状,长4-6毫米,外面疏被褐色柔毛,萼齿三角状披针形,与萼筒近等长或稍短;
花冠淡黄色,旗瓣倒卵形,长8-10毫米,先端微凹,基部渐狭成瓣柄,翼瓣较旗瓣稍短,瓣片椭圆形,基部具短耳,瓣柄与瓣片近等长,龙骨瓣与翼瓣近等长;子房无毛,具短柄。
荚果半卵形,长8-10毫米,宽3-5毫米,两端尖,果颈长约2毫米,近假2室。
种子少数,肾形,栗褐色,直径约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; 中国主要植物图说·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.
灌丛黄耆生长环境
生长于海拔3900米的山坡草地。[3]
灌丛黄耆分布范围
模式标本采自四川木里。