Family Code: ASTERA Genus Code: GRIND Genus CN: gumweed Genus Authority: Willd. Genus Summary: A genus of about 55 species, herbs and shrubs, of w. North America and South America. Genus References: Strother & Wetter in FNA (2006b); Cronquist (1980)=SE. Last Updated: 2019-11-29 Publish: 1