Asteraceae. Achillea millefolium. Yarrow
Yarrow (Achillea millefolium) is a flowering plant in the family Asteraceae, native to the Northern Hemisphere. Common yarrow is an erect herbaceous perennial plant that produces one to several stems ( to 1m tall) and has a rhizomatous growth from. It is a native of California, and other areas of the Western United States. Leaves are evenly distributed along the stem, with the leaves near the middle and bottom of the stem being the largest. The leaves have varying degrees of hairiness (pubescence). The leaves are 5-20 cm long, bipinnate or tripinnate, almost feathery, and arranged spirally on the stems. The leaves are cauline and more or less clasping. The inflorescence has 4 to 9 phyllaries and contains ray and disk flowers which are white to pink. There are generally 3 to 8 ray flowers that are ovate to round. Disk flowers range from 15 to 40. The inflorescence is produced in a flat-topped cluster. Yarrow grows up to 3500m above sea level. The plant commonly flowers from May through June. Common yarrow is frequently found in the mildly disturbed soil of grasslands and open forests. It occurs throughout the United States and is introduced in some areas. Active growth occurs in the spring. Yarrows can be planted to combat soil erosion due to the plant's resistance to drought. The herb is purported to be a diaphoretic, astringent, tonic, stimulant and mild aromatic. It contains isovalerianic acid, salicylic acid, asparagin, sterols, flavonoids, bitters, tannins, and coumarins. The plant also has a long history as a powerful 'healing herb' used topically for wounds, cuts and abrasions. The genus name Achillea is derived from mythical Greek character, Achilles, who reportedly carried it with his army to treat battle wounds. This medicinal action is also reflected in some of the common names mentioned below, such as Staunchweed and Soldier's Woundwort. The stalks of yarrow are dried and used as a randomising agent in I Ching divination. In the Middle Ages,Yarrow was
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