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How to Manage Pests

Identification: Weed Photo Gallery

Burning nettle

Scientific name: Urtica urens (Willowherb Family: Urticaceae)

Life stages of Burning nettle top picture bottom left picture bottom right picture

Click on image to enlarge

DESCRIPTION:
Burning nettle is a winter annual broadleaf in interior valleys but grows throughout the year on the California coast. It has rounded and smooth-margined cotyledons (seed leaves) with a small notch at the tip. The first true leaves are opposite, stalked and distinctly toothed. Mature plants are 5 to 24 inches (12.5 - 60 cm) tall, with stems branching from the base. Small greenish white flowers are clustered in the junction between the stem and upper leaf base. Both leaves and square stems have stinging hairs. It is especially troublesome in coastal counties of California where it grows all year. A related species, U. dioica, stinging nettle, is taller and has less round leaves.

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/burning_nettle.html revised: November 17, 2008. Contact webmaster.