Family Code: ASTERA Genus Code: MATRI Genus CN: mayweed Genus Authority: L. Genus Summary: A genus of about 7 species, herbs, of Eurasia and n. Africa. Genus References: Brouillet in FNA (2006a); Cronquist (1980)=SE; Arriagada & Miller (1997)=Z. [also see Tripleurospermum] Last Updated: 2019-11-29 Publish: 1