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孩儿草Rungia pectinata

时间:2013-07-15 16:24来源:未知 作者:徐晔春 点击:
孩儿草,Rungia pectinata,节节红




中文名(Chinese Name):孩儿草
学名(Scientific Name):Rungia pectinata (Linn.) Nees
英文名(English Common Name):
别名(Chinese Common Name):节节红
异名Synonym):Justicia pectinata L.  Rungia parviflora Hemsl.  Rungia parviflora var. pectinata (L.) C. B. Clarke  Rungia parviflora subsp. pectinata (L.) Crainer  
科属Family & Genus):爵床科(Acanthaceae)孩儿草属
形态特征Description):一年生纤细草本;枝圆柱状,干时黄色,无毛。叶薄纸质,下部的叶长卵形,长可达6厘米,通常4厘米左右,顶端钝,基部渐狭或有时近急尖,两面被紧贴疏柔毛;侧脉每边5条,常不甚明显;叶柄长3-4毫米或过之。穗状花序密花,顶生和腋生,长1-3厘米;苞片4列,仅2列有花,有花的苞片近圆形或阔卵形,长约4毫米,背面被长柔毛,膜质边缘宽约0.5毫米,被缘毛,无花的苞片长圆状披针形,长约6.5毫米,顶端具硬尖头,一侧或有时二侧均有狭窄的膜质边缘和缘毛;小苞片稍小;花萼裂片线形,等大,长约3毫米;花冠淡蓝色或白色,长约5毫米,除下唇外无毛,上唇顶端骤然收狭,下唇裂片近三角形。蒴果长约3毫米,无毛。花期早春。
分布(Distribution):产广东、海南、广西、云南。生于草地上,为一常见的野生杂草。印度、斯里兰卡、泰国、中南半岛也有分布。
用途(Use):据《广州植物志》载:取全草煎服,有去积、除滞、清火之效。
引自中国植物志英文版FOC Vol. 19 Page 443, 445
Rungia pectinata (Linnaeus) Nees in A. Candolle, Prodr. 11: 470. 1847.
孩儿草 hai er cao | Acanthaceae  | Rungia
Justicia pectinata Linnaeus, Amoen. Acad. 4: 299. 1760; Rungia parviflora Nees subsp. pectinata (Linnaeus) L. H. Cramer; R. parviflora var. pectinata (Linnaeus) C. B. Clarke; R. pectinata var. clarkeana Handel-Mazzetti.
Herbs 20-50 cm tall, annual or perennial. Stem basally prostrate and rooting at nodes then erect, minutely pubescent. Petiole 0-7 mm; leaf blade oblong-elliptic, 1-4 × 0.4-1.4 cm, glabrous except for a few trichomes along veins, secondary veins ca. 4 on each side of midvein, base cuneate and decurrent onto petiole, margin entire, apex acute. Spikes axillary or terminal, 0.5-2 cm, 1-sided, solitary or sometimes 2 or 3 compound; bracts dimorphic; sterile bracts green, elliptic, ca. 4 × 0.7 mm, glabrous, apex acute; fertile bracts circular to obovate, 4-5 × ca. 2 mm, pubescent, margin broadly hyaline, apex obtuse to rounded to emarginate and mucronulate; bracteoles elliptic, 2-3 mm, margin ciliate, apex 2-cleft and subacute. Calyx colorless, pubescent; lobes linear-lanceolate, ca. 3 × 0.5 mm, margin narrowly hyaline, apex mucronulate. Corolla blue or white, ca. 5 mm, outside pubescent; lower lip 3-lobed, lobes triangular; upper lip ovate, 1-2 mm, apex emarginate. Staminal filaments glabrous. Ovary glabrous. Capsule ellipsoid, ca. 2.5 mm, glabrous, 2-4-seeded, apex apiculate. Seeds orbicular in outline, ca. 1 mm in diam., minutely verrucose. Fl. Nov-Jan, fr. Jan-Apr. 2n = 26, 52.
Wastelands. Guangdong, Guangxi, Hainan, Yunnan [Bangladesh, Bhutan, India, Laos, Myanmar, Nepal, Sri Lanka, Thailand, Vietnam].
Rungia pectinata is a common weed in disturbed habitats.
This species is used medicinally.
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