The source is from the stem tuber of Alisma orientale (Sam) Juzep., family Alismataceae. The medicinal material is mainly produced in Fujian, Sichuan, and Jiangxi provinces, etc., dug and collected in winter when the tuber and leaves become yellow, dried in the sun or in the shade. The crude one or the one stir-baked with salt can be used.

Medicinal Properties: Sweet and bland in flavor, cold in nature and attributive to the kidney and bladder meridians.

Actions: Promote diuresis to resolve dampness from the lower energizer and expel heat.

Application
For edema, dysuria, diarrhea, turbid stranguria, leucorrhagia, and dizziness due to retention of phlegm, especially effective in dampness-heat type in the lower energizer, it is usually combined with Zhuling (Polyporus), Fuling (Poria), etc.; for dizziness due to retention of phlegm, combined with Baizhu (Rhizoma Atractylodis Macrocephalae), such as Zexie Tang (Decoction).

Usage and Dosage:
5 - 10 g is used in decoction for oral use.