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Yarrow Achillea millefolium (Achillea lanulosa)


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credit: Pablo Alberto Salguero Quiles/CCSA

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Alternate name: Common Yarrow

Family: Asteraceae, Aster view all from this family

Description Aromatic wildflower with flat lacy inflorescence.
Habit: native and introduced perennial; usually single stem; spreads by rhizomes or stonlons, may form large colonies.
Height: 2.5-40 in (6-60 cm) or more.
Leaf: extremely fine, ferny, grayish-green.
Flower: very small daisy-like flowerhead, white or pale pink, 1/4 in (6 mm) wide; held in tight, branched, flat-topped, terminal cluster, round to triangular, 2-4 in (5-10 cm) wide; dried flower persists on stem.
Fruit: tiny dry seed, winged, to .1 in (2 mm) long.

Flower Late April to early July in the south; mid-July to October in the north.

Habitat Usually dry or sandy soils, but also in damp, clayey, and salty soils: pastures, meadows, roadsides, stream sides, woodlands, waste grounds, fields, disturbed sites; to 12,000 ft (3600 m); also widely cultivated as an ornamental.

Range Native to some parts of North America, now naturalized throughout; found in all 50 states and every province of Canada.

Discussion Also known as common yarrow, milfoil, western yarrow, bloodwort, carpenter's weed, hierba de las cortaduras, plumajillo. Twelve varieties are recognized. Considered weedy or invasive in some areas. Numerous cultivars and hybrid yarrows are available in a wide range of colors.