large genus of coarse gummy herbs of western North and Central America

a large genus of coarse, sticky herbs found across Western North America

Grindelia is a genus of plants native to the Americas belonging to the family Asteraceae, (Compositae). G. squarrosa, a plant with bright yellow flowers indigenous to much of the United States, is commonly called curlycup gumweed. G. robusta, found in the western states, is a coastal scrub bush that is reputed to have several medicinal uses.

The dried stems and leaves of tarweed (Grindelia), used as a remedy in asthma and bronchitis.