UW Burke Herbarium species comparison

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Achillea millefolium

milfoil, yarrow
Habit Aromatic perennial from a rhizome, 1-10 dm. tall.
Leaves

Leaves narrow, tri-pinnate, the ultimate segments linear and short.
Flowers

Heads numerous, small, in a flat-topped inflorescence;

involucral bracts imbricate in several series, dry, the margins translucent;

rays 3-12, 2-3 mm. long and wide, white or occasionally light pink;

disk flowers 10-75, pale yellow, perfect and fertile;

receptacle convex, chaffy throughout;

pappus none.
Fruits

Achenes compressed parallel to the involucral bracts.

Achillea millefolium
Flowering time February-October
Habitat Common in open, dry to somewhat moist areas from low to high elevations; tolerant of disturbance.
Distribution
Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast; circumboreal
[WildflowerSearch map]
[BONAP county map]
Origin Both native and introduced populations
Conservation status Not of concern
Sibling taxa
A. ptarmica
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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