Gangbangui

Gangbangui

HerbaPolygoniPerfoliati

Perfoliate knitweed herb

[alias] Hemerocallis, serpentine, pear head thorn, serpentine.

[source] the aerial part of Polygonum perfoliatum L.

[plant morphology] perennial Polygonum herb. The stem is angular, reddish brown, with barbs. Leaves alternate, shield shaped; leaf blade subtriangular, 4-6cm long, 5-8cm wide, apex pointed, base subcordate or truncate, sparsely uncinate along veins below; Stipule nearly round, clasping stem; petiole long, sparsely uncinate. Inflorescence short spicate; bracts round; perianth 5-lobed, reddish or white, enlarged when bearing, fleshy, dark blue; stamens 8; style 3-lobed. Achenes globose, enclosed in a blue, juicy perianth. The flowering period is from June to August and the fruiting period is from September to October.

In valleys, bushes, or ditches. It is mainly produced in Jiangsu, Zhejiang, Fujian, Jiangxi, Guangdong, Guangxi, Sichuan, Hunan and Guizhou.

[harvesting] in summer, the flowers are harvested and dried in the sun.

[chemical constituents] it contains indican, persecarin, p-coumaricacid, ferulic acid, vanillic acid, protocatechuic acid and caffeic acid.

[flavor] slightly cold in nature and sour in taste.

[indications] diuresis, detumescence, heat clearing, detoxification, cough. For nephritis edema, pertussis, diarrhea, eczema, furuncle, snake bite.