Curlycup gumweed

Grindelia squarrosa (Pursh) Dun.

Asteraceae (Sunflower Family)


A member of the Sunflower family, curlycup gumweed is a weedy, warm-season perennial. The plant may be branched or unbranched, and it can vary from 8 to 35 inches tall.

Curlycup gumweed starts growth in late spring, begins to flower in July or August, and dries up in late summer. The leaves are hairless, shiny and heavily toothed along the margins. They tend to clasp the stem. The flowers are yellow and very sticky below the disk flowers.

The plant has been suspected of accumulating selenium. It has poor grazing value for wildlife and, when young, fair value for livestock.


This plant grows mainly in waste areas and disturbed areas as a weedy perennial.