喜馬拉雅黃耆檢視原始碼討論檢視歷史
喜馬拉雅黃耆 |
中文學名:喜馬拉雅黃耆 拉丁學名:Astragalus levitubus Tsai et Yu in Bull. 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 目:薔薇目 亞 目:薔薇亞目 科:豆科 亞 科:蝶形花亞科 族:山羊豆族·黃耆亞族 屬:黃耆屬 亞 屬:黃耆亞屬 組:膜莢組 |
喜馬拉雅黃耆(學名:Astragalus levitubus Tsai et Yu in Bull.,俗名:光萼芰草、光萼筒黃耆)是豆科黃芪屬的植物,為中國的特有植物。分布在中國大陸的四川、雲南等地,生長於海拔4,000米的地區,常生于山坡溪旁。 [1]
形態特徵
多年生草本。 莖直立,高20-30厘米,具條紋,散生白色或混有黑色柔毛。
羽狀複葉有7-11片小葉,長6-9厘米;葉柄長3-5厘米;托葉葉狀,離生,卵狀橢圓形,長12-17毫米,寬5-8毫米,具白色緣毛;小葉長圓狀卵形,長1.5-2.5厘米,寬1-1.3厘米,先端鈍圓,基部寬楔形或近圓形,具短柄,幼時散生白色長柔毛,後近無毛或僅具緣毛。
總狀花序有10餘朵花,稍緊密,長2.5-3.5厘米;總花梗較葉稍長或近等長;苞片披針形,長6-8毫米,寬約2毫米,背面被黑色柔毛;花梗長約2毫米,同花序軸密生黑色柔毛;
花萼鍾狀,長6-7毫米,萼筒無毛,萼齒披針形,長2-3毫米,兩面均被黑色柔毛,內面較密;花冠黃色,干時多少呈褐色,旗瓣倒卵形,長12-13毫米,先端微凹,基部漸狹;
翼瓣與旗瓣近等長,瓣片長圓形,基部具短耳,瓣柄長約8毫米;龍骨瓣與翼瓣近等長,瓣片半卵形,瓣柄比瓣片長近兩倍;子房狹卵形,被白色或黑色柔毛。具柄。[2]
未見成熟莢果。[3]
Astragalus levitubus Tsai et Yu in Bull. Fan Mem. Inst. Biol. Bot. 9: 261. 1939.
Astragalus levitubus H. T. Tsai & T. T. Yu.
Plants 10-30 cm tall, with soft hairs 0.5-1 mm. Stems sev-eral, slender, up to 2 mm thick, sparsely covered with ascending white hairs. Leaves 2-7 cm; stipules 6-15 mm, ciliate; petiole short, like rachis slender, glabrous or sparsely hairy; leaflets in 3-6(-8) pairs, elliptic, 4-11 × 2-6 mm, abaxially sparsely ap-pressed white hairy at margin and especially at midvein, adax-ially glabrous. Racemes densely 6-12-flowered; rachis densely black hairy; peduncle 1.5-16 cm, sparsely white hairy, toward top increasingly spreading black hairy; bracts whitish to greenish, linear-acute, 3-6 mm, black ciliate. Calyx campan-ulate, 4.5-7 mm, not gibbous at base, with truncate mouth, tube glabrous; teeth 1.5-3 mm, black hairy. Petals yellow or purple, often dark purplish brown when dry, all of same length; stan-dard widely obtriangular to widely obovate, 11-12 × 6-8 mm. Legumes stipitate, narrowly ellipsoid, ca. 1.5 cm, very densely covered with appressed black hairs, acuminate at both ends.
Alpine meadows; 3500-4900 m. Qinghai, Sichuan, Xinjiang, Xi-zang, Yunnan [Bhutan, India, Nepal].
生長環境
生長於海拔4000米以上的山坡溪旁。[4]
分布範圍
標本分布