Achillea Millefolium - Description

Description

A. millefolium is an erect herbaceous perennial plant that produces one to several stems (0.2 to 1 m tall) and has a rhizomatous growth form. 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 four to 9 phyllaries and contains ray and disk flowers which are white to pink. The generally three to eight ray flowers are ovate to round. Disk flowers range from 15 to 40. The inflorescence is produced in a flat-topped cluster. The fruits are small achenes. Yarrow grows at low or high altitudes, up to 3500 m above sea level. The plant commonly flowers from May through June, and is a frequent component in butterfly gardens. Common yarrow is frequently found in the mildly disturbed soil of grasslands and open forests. Active growth occurs in the spring.

In North America, both native and introduced genotypes, and both diploid and polyploid plants are found. The plant has a strong, sweet scent, similar to chrysanthemums.

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