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How to Manage Pests

Identification: Weed Photo Gallery

Common yarrow

Scientific name: Achillea millefolium (Sunflower Family: Asteraceae)

Life stages of Common yarrow Mature plant Seedling

Click on image to enlarge

DESCRIPTION:
Common yarrow is a perennial broadleaf plant with an extensive system of underground creeping stems. Cotyledons (seed leaves) are oblong or rounded. The first true leaves are divided with sharply pointed teeth. Leaves on mature plants are finely dissected, giving them a feathery appearance. White or yellow flowers are formed at the ends of stems in dense, flat clusters. In mowed situations, such as turf, flowers may not be observed. Fruit are one seeded, narrowly oblong to lance shaped, flattened, ribbed longitudinally and do not open at maturity. Common yarrow occurs in cool climates and in areas of frequent irrigation.

Broadleaf ID illustration.


Statewide IPM Program, Agriculture and Natural Resources, University of California
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For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/WEEDS/common_yarrow.html revised: November 17, 2008. Contact webmaster.