Yarrow (Achillea millefolium)

Yarrow (Achillea millefolium)

Home » Galleries and Lists » Wildflowers » Yarrow (Achillea millefolium)
Yarrow (Achillea millefolium)
Yarrow (Achillea millefolium)

Common Names: Common Yarrow, Western Yarrow, Yarrow, Milfoil
Synonyms: Achillea millefolium
Taxonomy: Sunflower (Asteraceae)
Habit: Perennial Forb
Size: up to 3’
Flowers: white
Bloom: Apr, May, Jun, Jul, Aug, Sep
Leaves: alternate compound
Fruit: cypsela, aschene

Yarrow grows to 3 feet tall and has no branches except near the top. The leaves are alternate, 3-5 inches long, with many leaflets on each side of the midrib and these are further divided into smaller leaflets, giving them a delicate, fernlike, lacy appearance. Flower heads are arranged in large, compact clusters at the top of the stem, each cluster consisting of 1 or more flower heads. The flower head has 20-25 yellowish-white (rarely pink) ray flowers and similarly colored disc flowers. There are generally 3 to 8 ray flowers, which are 1/4” long.

Distribution: Achillea millefolium is highly variable and has been treated both as a single species with varieties and as multiple distinct species. A. millefolium is cosmopolitan throughout the Northern Hemisphere. In North America, A. millefolium is a complex of both native and introduced plants and their hybrids.
Habitat: Yarrow grows from sea level to 3,500 m (11,500 ft) in elevation. Common yarrow is frequently found in the mildly disturbed soil of grasslands and open forests.

Yarrow (Achillea millefolium). Cedar Breaks National Monument, Utah
Yarrow (Achillea millefolium). Cedar Breaks National Monument, Utah