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

Natural enemies
Weeds

Publications & more
Workshops and events
Training programs
Pesticide information

Grants programs
Funded-project results


 

How to Manage Pests

Identification: Weed Photo Gallery

Yellow sweetclover

Scientific name: Melilotus officinalis (Pea or Bean Family: Fabaceae)

Life stages of Yellow sweetclover top left picture top right picture bottom picture

Click on image to enlarge

DESCRIPTION:
Yellow sweetclover, a biennial broadleaf, occurs in open, disturbed areas throughout the state. Mature, erect plants are 1 to 3 feet (30 - 90 cm) tall with spreading branches. Small, oblong cotyledons (seed leaves) are light green. The first true leaf is heart-shaped or round and may have wavy edges. True leaves are fully subdivided and consist of three leaflets. The terminal leaflet has a short stalk. Small, yellow flower clusters are borne at the ends of stalks. One or two-seeded pods have dark,egg-shaped seeds that are irregularly cross-ridged. Use hand weeding to remove plants before seeds are formed. The seeds are resistant to both soil fumigation and solarization. Two other common sweetclovers are Indian sweetclover, M. indica, and white sweetcover, M. alba.

See UC IPM's Clovers Pest Note for more information.

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