Yarrow

Yarrow

(Chinese medicine and plant Atlas)

[synonym] saw grass (Chinese medicine plant Atlas), centipede Artemisia, a seedling Artemisia (Shaanxi Chinese herbal medicine).

[source] it is the whole plant of yarrow in Compositae.

[plant morphology] yarrow

Perennial herbs. The stem is single, 35-50 cm high, covered with white soft hairs. The root leaves have short stalks, stem leaves have no stalks, alternate, oblong to oblong linear, up to 15 cm long and 3 cm wide, with 2-3 pinnate divisions, small lobes and sharp apex. Inflorescence arranged in corymbose shape, involucre obovate, 4-5 mm long, 3-4 mm wide; involucre oblong, dry membranous, multi row; each head flower has 5 (occasionally 4 or 6) side flowers with tongue shaped corolla, corolla pink or thin white, elliptic to oval, apex three lobed, length and width about 3 mm; the heart flower of head flower is tubular, bisexual, apex 5 lobed, Ovary inferior, receptacle with hypanthium. Achenes oblate, margin winged. The flowering period is from June to August.

It is distributed in Northeast and North China.

[collection] harvest from June to August. Cut the whole grass with inflorescence and dry it in the shade.

[chemical constituents] the essential oil is an important component of yarrow. The most volatile oil was found in buds or blooming flowers, followed by leaves and stems. What is the most important component in volatile oil?. Generally, the content of volatile oil and? Is used as the standard to determine the quality of this medicine, but some of the volatile oil of this plant does not contain? Especially the wild plants in mountainous areas. In addition to? In volatile oil, there are L - α - and D - α - pinene, β - pinene, l-limonene, L-BORNEOL, borneol acetate and other esters, l-camphor, 1,8-cineole, eugenol, Platycladus orientalis, caryophyllene, salicylic acid, valerenic acid, isovalerenic acid, formic acid, acetic acid, methyl alcohol, ethanol, formaldehyde, furfural, acetone, etc.

Flowers and leaves contain flavonoid glycosides: apigenin-7-d-glucoside and luteolin-7-d-glucoside. The leaves also contain tragacanthin, pregnol and alkaloid: stachydrine. Myristic acid, palmitic acid, hexanoic acid, linoleic acid, oleic acid, hexanol, TRIACONTANE, sitosterol and stigmasterol were also found in the flowers.

(1) hemostasis

It can be used in the treatment of intestinal and hemorrhoid bleeding, and can also be used in the treatment of nasal, dental or traumatic bleeding. The hemostatic effect may be due to the increase of platelet number and the shortening of bleeding time. In the acute test of dogs, 10% extract 2ml / kg can enhance the coagulation effect of sodium bromide (2.5mg/kg, both intravenous injection), shorten the coagulation time, and change the recalcification time, heparin tolerance test and coagulant activity, but the effect is weak. Achillene can shorten the coagulation time of rabbits, lasting for 45 minutes, without obvious toxicity. It can also enhance the contraction of uterine muscle, so it can be used for uterine bleeding.

② Anti inflammatory effect

The water extract of dried flower head has anti-inflammatory effect (mouse lower limb edema method), and its active component may be protein carbohydrates complex, which is soluble in water and has low toxicity. ? it has no anti-inflammatory effect on skin inflammation (human, rat and guinea pig) induced by ultraviolet radiation

③ Bitter taste invigorates the stomach

It can be used for gastrointestinal diseases. Oral administration can improve the secretion of gastric juice in healthy people.

④ Other functions

The dried whole herb contains alkaloids, which can reduce blood pressure and has weak antipyretic effect.

[nature and taste] Shaanxi Chinese herbal medicine: "sweet, bitter and pungent, cold in nature. "

Functions and indications: clearing away heat and toxin, harmonizing blood and regulating menstruation. It is used to treat carbuncle, furuncle, swelling and poison, traumatic injury, hemorrhoids, bleeding and irregular menstruation.

① Dictionary of Botany: "for tuberculosis. "

② Li Chenghu's medicinal botany: "sweating drives the wind. "

③ "Chinese medicine plant atlas": "aromatic sweat medicine, strong medicine, astringent medicine. Treatment of hemorrhoids bleeding, menstruation difficulties. "

④ Shaanxi Chinese herbal medicine: "clearing away heat and toxin, cooling blood and detumescence, relieving pain and regulating menstruation. It is used to treat snake dog bites, boils, carbuncle swelling, traumatic injuries, irregular menstruation, yin deficiency and bone steaming. "

[usage and dosage] oral administration: decoct soup, 1-3 yuan; or soak in wine. External use: tamping fresh products.

Chinese PinYin : Yang Shi Cao