Family Code: ASTERA Genus Code: LACTU Genus CN: lettuce Genus Authority: L. Genus Summary: A genus of about 75 species, herbs, nearly cosmopolitan (especially north temperate). Genus Identification: Identification notes: Most species are highly variable in leaf lobing. Genus References: Strother in FNA (2006a); Cronquist (1980)=SE; McVaugh (1972). [also see Ixeris] Last Updated: 2019-11-29 Publish: 1