兔尾黃耆檢視原始碼討論檢視歷史

兔尾黃耆

原圖鏈接 來自植物標本館

中文學名:兔尾黃耆 界:植物界 屬:黃耆屬 分布區域:草原及山坡草地 高:5-11厘米

兔尾黃耆(tù wěi huáng qí，學名 Astragalus laguroides Pall.，異名：Astragalus gobialtaicus Astragalus lagurus Astragalus lupulinus var. laguroides )，多年生草本，高5-11厘米。莖極短縮，不明顯。產內蒙古中部。生於草原及山坡草地。模式標本采自巴干毛塔蘇木。

兔尾黃耆形態特徵

　兔尾黃耆兔尾黃耆，多年生草本，高5-11厘米。莖極短縮，不明顯。羽狀複葉有5-13片小葉，長5-9厘米；葉柄與葉軸近等長，被白色伏貼的粗毛；托葉卵狀披針形，長4-5毫米，被白色半開展的粗毛；小葉橢圓形、倒卵形或披針形，長8-13米。

原圖鏈接 來自植物標本館

總狀花序卵狀長圓形，生多數花，排列緊密；總花梗與葉等長、稍長或稍短，被白色半伏貼毛；苞片線形，長2-3毫米，疏被白色長毛；花萼初期管狀，後稍膨大成長卵形，長9-10毫米，被白色開展的長毛，萼齒鑽形，長2-3毫米；

原圖鏈接 來自植物標本館

花冠淡紫色，旗瓣長14-16毫米，瓣片狹長圓形，先端鈍圓稀微凹，下部漸狹成瓣柄，翼瓣較旗瓣稍短，瓣片狹長圓形，先端全緣，長約為瓣柄的1/2，龍骨瓣較翼瓣短，長10-12毫米，瓣片較瓣柄短；子房近無柄，被白色綿毛。

莢果卵圓形，長7-8毫米，被白色開展毛，1室。

花期5-6月，果期6-7月。本變種與原變種不同處在於：花較小，旗瓣長不超過16毫米；花萼上無開展的黑毛；小葉不超過7對。

Astragalus laguroides Pall. Reise, Russ. Reich. 3: 750. 1776; DC. Prodr. 2: 300. 1825; Ledeb. Fl. Ross. 1: 646. 1842; Bunge in Mem. Acad. Sci. St. Petersb. VII. 15 (1): 236. 1869; Boriss. in Kom. Fl. USSR 12: 855. 1946.

Astragalus gobi-altaicus N. Ulziykhutag; A. lagurus Pal-las; A. lupulinus Pallas var. laguroides (Pallas) Basilevskaja.

Plants 5-16(-20) cm tall, acaulescent or nearly so, vege-tative parts covered with medifixed, appressed, white hairs 0.8-1.1 mm. Stems, if present, up to 1.5 cm, densely hairy. Leaves 3-14 cm; stipules 6-7(-10) mm, adnate to petiole for 2(-3) mm, hairy; petiole 1.5-5 cm, like rachis densely to rather densely hairy; leaflets in 3-5(-8) pairs, in basal leaves often only in 1 or 2 pairs, 8-25 × 3-8 mm, both surfaces rather densely hairy, apex acute. Racemes ovoid, 2-6 cm, densely many flowered; peduncle 2-11 cm, rather densely covered with symmetrically or asymmetrically bifurcate, appressed to subap-pressed, white hairs 0.4-1 mm, toward raceme sometimes also with some black hairs mixed in; bracts 5-10 mm, covered with asymmetrically bifurcate, at margins with basifixed, white hairs. Calyx at anthesis tubular, soon becoming inflated ovoid, 11-14 mm, loosely to rather densely covered with asymmetrically bi-furcate to basifixed, tangled, spreading, white hairs 1-2 mm, with some black hairs mixed in; teeth 3-6 mm. Petals violet; standard narrowly obovate, 17-20 × 6-7 mm, mostly slightly constricted in middle, apex emarginate; wings 14-17 mm; keel 13-15 mm. Legumes included in calyx, sessile, oblong, 7-8 mm, with a hooked beak ca. 1 mm, 1-locular; valves covered with spreading white hairs.

Xinjiang [Mongolia, Russia (Siberia)].

兔尾黃耆生長環境

生長於草原及山坡草地。

兔尾黃耆分布範圍

分布於內蒙古中部。模式標本采自巴干毛塔蘇木。