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Dinghushan | Family List | Polygonaceae | Polygonum

Polygonum hydropiper L.

水蓼

Description from Flora of China

Persicaria hydropiper (Linnaeus) Spach; ?P. hydropiper var. diffusa Kitagawa; P. hydropiper var. vulgaris (Meisner) Ohki; P. vernalis Nakai; ?Polygonum hydropiper var. longistachyum Y. L. Chang & S. X. Li; P. hydropiper var. vulgare Meisner; P. schinzii J. Schuster.

Herbs annual. Stems erect, 40-70 cm tall, much branched, glabrous, dilated at nodes. Leaves with peppery taste; petiole 4-8 mm; leaf blade lanceolate or elliptic-lanceolate, 4-8 × 0.5-25 cm, both surfaces glabrous, densely brown punctate, sometimes appressed hispidulous along midvein, base cuneate, margin ciliate, apex acuminate; cleistogamous flowers present in many leaf axils; ocrea tubular, 1-1.5 cm, membranous, sparsely appressed hispidulous, apex truncate, shortly ciliate. Inflorescence terminal or axillary, spicate, pendulous, interrupted below, usually lax, 3-8 cm, slender; bracts green, funnel-shaped, 2-3 mm, margin membranous, sparsely shortly ciliate, each 3-5-flowered. Pedicels longer than bracts. Perianth greenish, white or pink above, 5(or 4)-parted, brownish pellucid glandular punctate; tepals elliptic, 3-3.5 mm. Stamens 6, rarely 8, included. Styles 2 or 3. Achenes included in persistent perianth, black-brown, opaque, ovoid, biconvex or trigonous, 2-3 mm, densely small pitted. Fl. May-Sep, fr. Jun-Oct. 2n = 18-22.

Riverbanks, streamsides, wet valleys; sea level to 3500 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Bangladesh, Bhutan, India, Indonesia, Japan, Kazakhstan, Korea, Kyrgyzstan, Malaysia, Mongolia, Myanmar, Nepal, Russia, Sikkim, Sri Lanka, Thailand, Uzbekistan; Australia, Europe, North America].

生活型: 草本

栽培植物: 野生

特征: 一年生草本;花白色

花期: 4

生境: 生于耕地、田野、路旁、水边湿处

用途: 全草药用,消肿解毒,利尿去湿、止痛止泻、祛风、杀虫,治肠炎、腹泻、跌打、风湿、疮疖、蛇伤、痢疾及洗疥癣、皮肤搔痒等;又可作农药和灭蛆

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲

中文别名: 辣蓼、蓼


 

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