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墨苜蓿Richardia scabra

时间:2013-11-08 13:05来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):墨苜蓿 学名( Scientific Name ): Richardia scabra L. 英文名( English Common Name ): rough Mexican clover 别名( Chinese Common Name ): 异名( Synonym ): 科属( Family Genus ): 茜草科(Rubiaceae)墨苜蓿
中文名(Chinese Name):墨苜蓿
学名(Scientific Name):Richardia scabra L.
英文名(English Common Name):rough Mexican clover
别名(Chinese Common Name):
异名(Synonym):
科属(Family & Genus):茜草科(Rubiaceae)墨苜蓿属
形态特征(Description):一年生匍匐或近直立草本,长可至80余厘米或过之;主根近白色。茎近圆柱形,被硬毛,节上无不定根,疏分枝。叶厚纸质,卵形、椭圆形或披针形,长1-5厘米或过之,顶端通常短尖,钝头,基部渐狭,两面粗糙,边上有缘毛;叶柄长约5-10毫米;托叶鞘状,顶部截平,边缘有数条长约2-5毫米的刚毛。头状花序有花多朵,顶生,几无总梗,总梗顶端有1或2对叶状总苞,分为2对时,则里面1对较小,总苞片阔卵形;花6或5数;萼长2.5-3.5毫米,萼管顶部缢缩,萼裂片披针形或狭披针形,长约为萼管的2倍,被缘毛;花冠白色,漏斗状或高脚碟状,管长2-8毫米,里面基部有一环白色长毛,裂片6,盛开时星状展开,偶有熏衣草的气味;雄蕊6,伸出或不伸出;子房通常有3心皮,柱头头状,3裂。分果瓣3 (-6),长2-3.5毫米,长圆形至倒卵形,背部密覆小乳凸和糙伏毛,腹面有一条狭沟槽,基部微凹。花期春夏间。
分布(Distribution):原产热带美洲,在我国南部部分地区逸生。
用途(Use):
引自中国植物志英文版:FOC Vol. 19 Page 303   
Richardia scabra Linnaeus, Sp. Pl. 1: 330. 1753.
墨苜蓿 mo mu xu| Rubiaceae  | Richardia
Richardia pilosa Ruiz & Pavon; Richardsonia scabra (Linnaeus) A. Saint-Hilaire.
Herbs, annual, decumbent or suberect, to 80 cm or longer; stems flattened to subterete, hirsute. Petiole 5-10 mm, hirsute to glabrescent; leaf blade drying membranous to thickly papery, ovate, elliptic, or lanceolate, 1-5 × 0.5-3.5 cm, both surfaces scabrous to glabrescent, base acute to cuneate, apex acute to obtuse; stipule sheaths 1-4 mm, pilose to pilosulous, with 3-15 setae 2-5 mm. Inflorescences ca. 1 cm in diam. (not including leaflike bracts or subtending leaves). Calyx with ovary portion obovoid, 1-1.5 mm, papillose to hispidulous; lobes 6, lanceolate or narrowly lanceolate, 1.5-3.5 mm, glabrescent, margins ciliate, apex acute. Corolla white, glabrous inside and outside; tube 2-8 mm; lobes 6, triangular, 1-3 mm. Fruit with mericarps 3, ellipsoid to obovoid, in cross-section triangular to somewhat rounded, 2-3.5 mm, dorsally densely papillose to hispidulous, ventrally with 1 narrow groove along length of face. Fl. and fr. Feb-Nov.
Wastelands; sea level to 200 m. Naturalized in Guangdong, Hainan, and Taiwan [native to the Antilles and North and South America; adventive and naturalized occasionally throughout Old World tropics].
H. S. Lo (in FRPS 71(2): 203. 1999) noted that this species was introduced to China in the 1980s.
 


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