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三裂叶薯Ipomoea triloba

时间:2013-09-05 10:58来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):三裂叶薯 学名( Scientific Name ): Ipomoea triloba L. 英文名( English Common Name ): littlebell 别名( Chinese Common Name ): 小花假番薯 异名( Synonym ): Batatas triloba (L.) Choisy Ipomoea blancoi Chois
中文名(Chinese Name):三裂叶薯
学名(Scientific Name):Ipomoea triloba L.
英文名(English Common Name):littlebell
别名(Chinese Common Name):小花假番薯
异名(Synonym):Batatas triloba (L.) Choisy  Ipomoea blancoi Choisy
科属(Family & Genus):旋花科(Convolvulaceae)番薯属
形态特征(Description):草本;茎缠绕或有时平卧,无毛或散生毛,且主要在节上。叶宽卵形至圆形,长2.5-7厘米,宽2-6厘米,全缘或有粗齿或深3裂,基部心形,两面无毛或散生疏柔毛;叶柄长2.5-6厘米,无毛或有时有小疣。花序腋生,花序梗短于或长于叶柄,长2.5-5.5厘米,较叶柄粗壮,无毛,明显有棱角,顶端具小疣,1朵花或少花至数朵花成伞形状聚伞花序;花梗多少具棱,有小瘤突,无毛,长5-7毫米;苞片小,披针状长圆形;萼片近相等或稍不等,长5-8毫米,外萼片稍短或近等长,长圆形,钝或锐尖,具小短尖头,背部散生疏柔毛,边缘明显有缘毛,内萼片有时稍宽,椭圆状长圆形,锐尖,具小短尖头,无毛或散生毛;花冠漏斗状,长约1.5厘米,无毛,淡红色或淡紫红色,冠檐裂片短而钝,有小短尖头;雄蕊内藏,花丝基部有毛;子房有毛。蒴果近球形,高5-6毫米,具花柱基形成的细尖,被细刚毛,2室,4瓣裂。种子4或较少,长3.5毫米,无毛。
分布(Distribution):产广东及台湾,生丘陵路旁、荒草地或田野。原产热带美洲,现成泛热带杂草。
用途(Use):
引自中国植物志英文版FOC Vol. 16 Page 307      
Ipomoea triloba Linnaeus, Sp. Pl. 1: 161. 1753.
三裂叶薯 shan lie ye shu| Convolvulaceae  | Ipomoea
Batatas triloba (Linnaeus) Choisy; Convolvulus trilobus (Linnaeus) Desrousseaux; Ipomoea blancoi Choisy.
Herbs annual. Stems twining or prostrate, glabrous or nodes sparsely pubescent. Petiole 2.5-6 cm, glabrous, sometimes tuberculate; leaf blade broadly ovate to circular in outline, 2.5-7 X 2-6 cm, glabrous or sparsely pilose, base cordate, margin entire or coarsely dentate to deeply 3-lobed. Inflorescences dense umbellate cymes, 1- to several flowered; peduncle 2.5-5.5 cm, glabrous, angular, verruculose distally; bracts lanceolate-oblong, minute. Pedicel 5-7 mm, ± angular, glabrous, verruculose. Sepals slightly unequal, 5-8 mm, glabrous or sparsely pilose abaxially, margin fimbriate, apex obtuse or acute, mucronulate; outer 2 oblong, slightly shorter; inner 3 elliptic-oblong. Corolla pink or pale purple, funnelform, 1.5-2 cm, glabrous; limb obtusely 5-lobed. Stamens included. Pistil included; ovary pubescent. Stigma 2-lobed. Capsule ± globular, 5-6 mm, bristly pubescent, apiculate, 2-loculed, 4-valved. Seeds dark brown, ca. 3.5 mm, glabrous. 2n = 30.
Roadsides or fields; 0-800 m. Anhui, Guangdong, S Shaanxi, Taiwan, Zhejiang [Indonesia, Japan (Ryukyu Islands), Malaysia, New Guinea, Philippines, Sri Lanka, Thailand, Vietnam; North America (native to the West Indies), Pacific Islands, now a circumtropical weed].






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