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大叶胡枝子Lespedeza davidii

时间:2018-08-14 08:14来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):大叶胡枝子 学名( Scientific Name ): Lespedeza davidii Pranch. 英文名( English Common Name ): 别名( Chinese Common Name ): 大叶马料稍 异名( Synonym ): Lespedeza davidii var. exalata 科属( Family Genus
中文名(Chinese Name):大叶胡枝子
学名(Scientific Name):Lespedeza davidii Pranch.
英文名(English Common Name):
别名(Chinese Common Name):大叶马料稍
异名(Synonym):Lespedeza davidii var. exalata
科属(Family & Genus):蝶形花科,Fabaceae胡枝子属
形态特征(Description):直立灌木,高1-3米。枝条较粗壮,稍曲折,有明显的条棱,密被长柔毛。托叶2,卵状披针形,长5毫米;叶柄长1-4厘米,密被短硬毛;小叶宽卵圆形或宽倒卵形,长3.5-7(-13)厘米,宽2.5-5(-8)厘米,先端圆或微凹,基部圆形或宽楔形,全缘,两面密被黄白色绢毛。总状花序腋生或于枝顶形成圆锥花序,花稍密集,比叶长;总花梗长4-7厘米,密被长柔毛;小苞片卵状披针形,长2毫米,外面被柔毛;花萼阔钟形,5深裂,长6毫米,裂片披针形,被长柔毛;花红紫色,旗瓣倒卵状长圆形,长10-11毫米,宽约5毫米,顶端圆或微凹,基部具耳和短柄,翼瓣狭长圆形,比旗瓣和龙骨瓣短,长7毫米,基部具弯钩形耳和细长瓣柄,龙骨瓣略呈弯刀形,与旗瓣近等长,基部有明显的耳和柄,子房密被毛。荚果卵形,长8-10毫米,稍歪斜,先端具短尖,基部圆,表面具网纹和稍密的绢毛。花期7-9月,果期9-10月。
分布(Distribution):产江苏、安徽、浙江、江西、福建、河南、湖南、广东、广西、四川、贵州等省区。生于海拔800米的干旱山坡、路旁或灌丛中。
用途(Use):本种耐干旱,可作水土保持植物。
引自植物志英文版:FOC Vol. 10 Page 303, 306
Lespedeza davidii Franchet, Nouv. Arch. Mus. Hist. Nat., sér. 2, 5: 246; Pl. David. 1: 94. 1883.
大叶胡枝子 da ye hu zhi zi| Fabaceae  | Lespedeza
Lespedeza davidii var. exalata L. H. Lou; L. hupehensis Ricker; L. merrillii Ricker.
Shrubs, erect, 1-3 m tall. Branchlets distinctly angular, densely villous. Leaves 3-foliolate; petiole 1-4 cm, densely his­pidulous; leaflets broadly ovate or broadly obovate, terminal one 3.5-7(-13) × 2.5-5(-8) cm, both surfaces densely yel­lowish white sericeous, base rounded or broadly cuneate, apex rounded or emarginate. Racemes axillary or in panicles at apex of branchlets, longer than leaves; peduncle 4-7 cm, densely villous. Calyx ca. 6 mm, 5-lobed, villous; lobes lanceolate, acu­minate, more than 2 × as long as tube. Corolla reddish purple; standard obovate-oblong, 1-1.1 cm × ca. 5 mm, auriculate, shortly clawed; wings narrowly oblong, shorter than standard and keel, auriculate, slenderly clawed; keel petals slightly fal­cate, subequal to standard, distinctly auriculate and clawed. Ovary densely hairy. Legume ovoid, 8-10 mm, somewhat densely sericeous, reticulate veined. Fl. Jul-Sep, fr. Sep-Oct. 2n = 22*.
● Arid mountain slopes, roadsides, thickets; ca. 800 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Henan, ?Hubei, Hunan, Jiang­su, Jiangxi, Sichuan, Zhejiang [naturalized in Japan].
Because this species tolerates arid soils, it is used for soil conser­vation.
Lespedeza merrillii was described from Zhejiang (Lingnan Sci. J. 20: 202. 1942). Its description is based on a single specimen (C. Y. Chiao 14377). Ricker said that this species is nearest to L. davidii but distinguished from it by the sparsely appressed, instead of velvety, pubescence of the stems and longer calyx teeth. One of us (Huang), following Li and Chen (FRPS 41: 140. 1995), retains L. merrillii here in synonymy due to the lack of specimens. Two of us (Ohashi and Nemoto) regard this species as merely a glabrous form of L. davidii.
 




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