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Contact Info

Phone: 307-472-5559
Hours: 7:30am - 4:00 Monday-Friday
If you need assistance after hours: Please Call Brian Connely , 307-267-3848

Curlycup Gumweed

Grindelia squarrosa

This is a biennial or short-lived perennial growing 1-3 feet tall.

Up to 30,000 seeds can be produced per plant.
Seeds can remain viable for up to 10 years!

Leaves are alternate with saw-toothed margins.

Flowers are yellow, 1 inch wide, and borne singly on the ends of the stems.

Curved bracts beneath the flowers secrete a sticky substance.

Curlycup gumweed is a native plant, but can form dense monoculture stands. It is drought resistance and increases after periods of dryness. It is unpalatable to livestock and is difficult to control, especially if it occupies hay ground. This plant is found throughout Natrona County in pastures, roadsides, and waste areas.


Control of this plant is difficult and location dependent. Call your local weed district for more info.