Gouyang

Gouyang

(Henan Chinese herbal medicine manual)

[synonym] dahuanhua, fu'er Miao, Gouwa Miao (Henan Chinese herbal medicine manual).

[source] it is the root and whole grass of Japanese sword of Convolvulaceae.

[plant morphology] Japanese sword

Herbs perennial, tufted with fine hairs. Stems twining or creeping, base branched. Leaves alternate, oblong or lanceolate, long ovate, 4-8 cm long, 1-3 cm wide, apex obtuse, apical, base hastate, lower leaves entire, upper leaves often 3-lobed, middle lobes oblong or lanceolate, bilateral lobes short, triangular, spreading, petiole shorter than leaves. Flowers solitary in leaf axils, pedicel 3-10 cm long; calyx 5, with 2 large bracts outside calyx; corolla funnel-shaped, pink, 5-lobed; stamen 5, concealed; pistil 1. Capsule globose, smooth. Seeds ovoid, glabrous.

Most of them live in fields, ridges, ditches and hillside wasteland. Distributed in Hebei, Henan, Jiangsu and other places.

[collection] in summer and autumn, the roots were dug out, cut into sections and dried in the sun.

The chemical constituents are kaempferol-3-glucoside and kaempferol-3-glucoside. It has the function of purgation and diuresis.

[pharmacological action] a flavonol glycoside was extracted from Japanese sword. After hydrolysis, kaempferol had diuretic effect.

[nature and taste] Handbook of Chinese herbal medicine in Henan Province: "sweet and cold. "

[functions and indications] 1. Henan Chinese herbal medicine manual: "clearing heat, nourishing Yin, lowering blood pressure, diuresis. "

② Su Yi's Handbook of Chinese herbal medicine: "rhizome can strengthen the stomach, eliminate food, strengthen the body, and facilitate urination and defecation. It can treat dyspepsia, diabetes and promote fracture healing. "

[usage and dosage] oral administration: decoction, 0.5-1 Liang.

[selection] 1. Treatment of hypertension: one or two roots of doggie. Decoction, twice a day.

② The treatment of urination is not good: dog seedlings with roots, whole grass, twelve or five money, bran grain old two to three. Take it in water. (the Handbook of Chinese herbal medicine in Henan Province was selected)