UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

Search

SKIP navigation

Home & garden
Agriculture
Natural environments
Exotic & invasive

Weather data & products
Degree-days
Interactive tools & models

Publications & more
Workshops and events
PCA exam helper
Pesticide information

Grants programs
Funded-project results


 

How to Manage Pests

Identification: Weed Photo Gallery

Jimsonweed

Scientific name: Datura stramonium (Family Solanaceae)

Click on image to enlarge

DESCRIPTION:
Jimsonweed, a broadleaved annual, prefers warm growing areas. Leaves have an unpleasant odor when slightly bruised. Cotyledons are long and narrow. First true leaves are spade shaped and have many veins and may be somewhat puckered. Mature plants are erect, 1.75 to 4 feet (52.5 - 120 cm) tall and have elliptical to egg-shaped leaves that are uneven at the margins and show puckering between the veins. Showy white trumpet flowers are 2 to 4 inches (5 - 10 cm) long. A four-segmented pod opens from the tip when ripe, exposing, many dark, pitted seeds with tiny wrinkles. It competes severely for water and grows rapidly.

Broadleaf ID illustration.


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2008 The Regents of the University of California. All rights reserved.

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/jimsonweed.html revised: March 11, 2008. Contact webmaster.