Family Code: LAMIAC Genus Code: AGAST Genus CN: giant hyssop Genus Authority: Clayton ex Gronov. Genus Summary: A genus of about 22 species, herbs, of c. and e. Asia, and North America to Mexico. Genus References: Vogelmann (1985); Lint & Epling (1945); Harley et al. in Kadereit (2004). Last Updated: 2019-11-29 Publish: 1