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宽爪黄耆 |
中文学名:宽爪黄耆 拉丁学名:Astragalus latiunguiculatus Y. C. Ho in Bull. 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 目:蔷薇目 亚 目:蔷薇亚目 科:豆科 亚 科:蝶形花亚科 族:山羊豆族 黄耆亚族 属:黄耆属 亚 属:黄耆亚属 组:疏花组 |
宽爪黄耆(kuān zhǎo huáng qí,学名:Astragalus latiunguiculatus Y. C. Ho in Bull.)是豆科黄芪属的植物,为中国的特有植物。分布在中国大陆的四川等地,生长于海拔3,500米的地区,见于山坡草地。 [1]
宽爪黄耆形态特征
多年生小草本,高8-12厘米。 茎直立或上升,被白毛或混生黑色短伏贴柔毛。
羽状复叶有11-19片小叶,长3-6厘米;叶柄长1-2厘米,向上逐渐变短;托叶离生,宽三角状卵形,长3-4毫米;小叶卵形至长圆状披针形,长5-10毫米,宽1.5-4.5毫米,先端钝尖或微凹,基部宽楔形或近圆形,具短柄,上面无毛,下面被白色伏贴柔毛。
总状花序生10数花,稍密集,呈头状,花序轴长1.5-2.5厘米;总花梗与叶近等长;苞片狭卵形或披针形,长3-4毫米,散生白色或褐色柔毛;花萼管状,长约5毫米,密被褐色柔毛,萼齿钻状,长约2毫米;
花冠青紫色,旗瓣倒卵形,长约10毫米,先端微凹,具较宽的瓣柄,翼瓣比旗瓣稍短,瓣片长圆形,基部具耳,瓣柄细,长约3毫米,龙骨瓣较翼瓣短,长约7毫米,瓣片狭半卵形,瓣柄与瓣片近等长;子房卵形,具短柄,被褐色柔毛。 [2]
未见成熟荚果。 [3]
Astragalus latiunguiculatus Y. C. Ho in Bull. Bot. Lab. N. -E. For. Inst. 8 (8): 60. f. 4. 1980.
Plants 8-25 cm tall, caespitose. Stems several to many, in lower parts sparsely and in upper part to densely covered with appressed to subappressed black hairs 0.1-0.3 mm. Leaves 3-7 cm; stipules 3-5 mm, sparsely predominantly white hairy and ciliate to subglabrous; petiole 1-2 cm, with rachis sparsely to loosely hairy like stem; leaflets in 6-9 pairs, narrowly elliptic, 5-12 × 2-4.5 mm, abaxially loosely covered with short white hairs, adaxially glabrous, apex subacute to rounded. Ra-cemes 1.5-2.5 cm, 6-10-flowered; peduncle 5-9 cm, densely hairy like stem; bracts whitish membranous, linear, 3-4 mm, white and blackish hairy. Calyx 5-6 mm, rather densely covered with appressed blackish hairs 0.05-0.2 mm; teeth 1.5-2 mm. Petals yellowish green, keel violet; standard obovate, 10-11 × ca. 7 mm, without distinct claw; wings 9-10 mm; keel 7-8 mm. Ovary subsessile, shortly white hairy. Legumes unknown.
● Alpine slopes; 3600-4400 m. Sichuan.
宽爪黄耆生长环境
生长于海拔3500米以上的山坡草地。 [4]