Chinese Name: roentgenol
[category]: whole grass
Heartleaf houttuynia herb
[alias]: smelly vegetable, lateral ear root, smelly root grass, smelly elixir.
[source]: it is the aerial part of houttuyniacordata Thunb.
[harvesting]: in summer and autumn, the stems and leaves are luxuriant, and the flowers and spikes are often harvested to remove impurities and dry in the sun.
[nature and taste]: slightly cold in nature and bitter in taste.
[plant morphology]: perennial herb, 15-50cm high, with fishy smell. The lower part of the stem is on the ground, rooting, and the upper part is erect. Leaves alternate, heart-shaped or broad ovate, 3-8cm long and 4-6cm wide, apex acuminate, entire, with small glandular spots, slightly pilose on veins, purplish red below; petiole 3-5cm long; stipules strip-shaped, the lower part of which combines with petiole to form sheath. The spike is on the top of the stem, opposite to the leaf, with 4 white petal bracts at the base; the flower is small, without perianth, with 1 Linear bract; the stamen is 3, the lower part of the filament is connate with the ovary; the carpel is 3, the lower part is connate. Capsule ovoid, apex dehiscent. The flowering period is from May to August and the fruiting period is from July to October.
[growing place]: it grows in mountain area, ditch side, pond side, field stem or under Forest Wetland. It is mainly produced in Jiangsu, Zhejiang, Jiangxi, Anhui, Sichuan, Yunnan, Guizhou, Guangdong and Guangxi.
[chemical composition]: it contains volatile oil, mainly methylnonylketone, decanoylacetalbehyde, cinnamene, octanoic acid and decanoic acid; it also contains quercitrin, Isoquercitrin, Hyperoside and rutin.
Main indications: clearing away heat and toxin, removing carbuncle and pus, diuresis and relieving gonorrhea. It is used for lung abscess, phlegm heat cough, heat dysentery, heat drenching, carbuncle swelling, sore and poison.
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