Golden buckwheat

Rhizoma Fagopyri cymosi

Wildbuck when rhizome

[alias] wild buckwheat, buckwheat Panax notoginseng, jinsuoyingkai.

[source] it is the rhizome of Fagopyrum cymosum (Trev.) Meisn.

[plant morphology] perennial herb, 0.5-1.5 m high. Rhizome thick, nodular, transverse, reddish brown, stem erect, grooved, green or reddish brown. Leaves alternate, Euphorbia new poetry triangle, length and width are almost equal, apex protruding, base heart-shaped Euphorbia, edge wavy; Stipule sheath subtubular oblique, membranous. Flowers small, integrated into terminal or axillary cymes; tepals 5, white; stamens 8; ovary superior, style 3. Achenes ovate, 3-ribbed, reddish brown. The flowering period is from July to September, and the fruiting period is from October to November.

It is found on hillside, wilderness, roadside and wet places. It is mainly produced in Jiangsu and Zhejiang.

[harvest] in summer and autumn, the roots and stems were collected, washed and dried.

[character] the rhizome is irregular and massive. It often has nodular branches, varying in length, 1-4cm in diameter. The surface is dark grayish brown, with links and longitudinal wrinkles, and the surface is densely covered with point shaped leather knife. It is hard, not easy to break. The cross section is yellowish white to yellowish brown, with radial texture and medulla in the center. Qi is weak. The taste is slightly astringent.

[chemical constituents] it contains shakuchirin. After hydrolysis, p-coumaric acid, ferulic acid and glucose are produced, and dimeric procyanidin is the main active component.

[flavor] cool in nature, astringent and slightly pungent in taste.

[indications] clearing away heat and toxin. Clearing lung, expelling phlegm, expelling pus and detumescence, expelling wind and removing dampness. For lung abscess, sore throat, dysentery, nameless swelling, traumatic injury, rheumatoid arthritis pain.