Rhizome Alisma plantago aquatica / Ze Xie
The fruit-spike is collected in summer and autumn when seed is ripe, and dried in the sun. The herb is rubbed out and removed from the cask and is reported to have diuretic, expectorant, antitussive and antimicrobial actions and complement treatments for Edema, painful urination, dysuria, hematuria, urolithiasis, diarrhoea, diuresis and rheumatism.