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沙冬青 Ammopiptanthus mongolicus

时间:2018-08-14 08:27来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):沙冬青 学名( Scientific Name ): Ammopiptanthus mongolicus (Maxim. ex Kom.) Cheng f. 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Piptanthus chinensis Przewal. Piptanthus
中文名(Chinese Name):沙冬青
学名(Scientific Name):Ammopiptanthus mongolicus (Maxim. ex Kom.) Cheng f.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Piptanthus chinensis Przewal.  Piptanthus mongolicus Maxim. ex Kom.
科属(Family & Genus):蝶形花科,Fabaceae沙冬青属
形态特征(Description):常绿灌木,高1.5-2米,粗壮;树皮黄绿色,木材褐色。茎多叉状分枝,圆柱形,具沟棱,幼被灰白色短柔毛,后渐稀疏。3小叶,偶为单叶;叶柄长5-15毫米,密被灰白色短柔毛;托叶小,三角形或三角状披针形,贴生叶柄,被银白色绒毛;小叶菱状椭圆形或阔披针形,长2-3.5厘米,宽6-20毫米,两面密被银白色绒毛,全缘,侧脉几不明显,总状花序顶生枝端,花互生,8-12朵密集;苞片卵形,长5-6毫米,密被短柔毛,脱落;花梗长约1厘米,近无毛,中部有2枚小苞片;萼钟形,薄革质,长5-7毫米,萼齿5,阔三角形,上方2齿合生为一较大的齿;花冠黄色,花瓣均具长瓣柄,旗瓣倒卵形,长约2厘米,翼瓣比龙骨瓣短,长圆形,长1.7厘米,其中瓣柄长5毫米,龙骨瓣分离,基部有长2毫米的耳;子房具柄,线形,无毛。荚果扁平,线形,长5-8厘米,宽15-20毫米,无毛,先端锐尖,基部具果颈,果颈长8-10毫米;有种子2-5粒。种子圆肾形,径约6毫米。花期4-5月,果期5-6月。
分布(Distribution):产内蒙古、宁夏、甘肃。生于沙丘、河滩边台地,为良好的固沙植物。蒙古也有。
用途(Use):产内蒙古、宁夏、甘肃。生于沙丘、河滩边台地,为良好的固沙植物。蒙古南部也有分布。
引自植物志英文版:FOC Vol. 10 Page 3, 100
Ammopiptanthus mongolicus (Maximowicz ex Komarov) S. H. Cheng, Bot. Zhurn. (Moscow & Leningrad). 44: 1381. 1959.
沙冬青 sha dong qing | Fabaceae  | Ammopiptanthus
Piptanthus mongolicus Maximowicz ex Komarov, Trudy Glavn. Bot. Sada 34: 33. 1920; Ammopiptanthus nanus (Popov) S. H. Cheng; P. nanus Popov.
Evergreen shrubs, 1.5-2 m tall; bark yellowish brown. Stems terete, weakly ridged, gray puberulent at first, glabres­cent. Leaves 1- or 3-foliolate; stipules small, triangular, adnate to petiole, silvery tomentose; petiole 4-15 mm; leaflets rhom­bic-elliptic or broadly elliptic to broadly ovate, 1.5-4 × 0.6-2.4 cm, densely silvery tomentose on both surfaces, lateral veins in­conspicuous, base broadly cuneate to rounded, apex obtuse, often mucronate. Flowers 4-15, in short dense terminal ra­cemes; bracts ovate, 5-6 mm, deciduous; pedicels ca. 1 cm, subglabrous, with 2 bracteoles at midpoint. Calyx 5-7 mm. Corolla yellow, ca. 2 cm, petals long clawed. Ovary stipitate, glabrous. Legume linear-oblong, 3-8 × 1-2 cm, flat, apex acute to obtuse; stipe 8-10 mm. Seeds 2-5, orbicular-reniform, ca. 6 mm in diam. Fl. Apr-Jun, fr. May-Aug.
Sand dunes, gravel slopes, terraces beside ravines. Gansu, Nei Mongol, Ningxia, W Xinjiang (Kashi) [Kazakhstan, Kyrgyzstan, S Mongolia].
Two species have been recognized, but the differences between them are of degree only and do not appear to merit recognition of more than one rather variable species. Many species of arid areas vary considerably in their morphology according to water availability, grazing, and season, and this species appears to be no exception.


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