Family Code: RHAMNA Genus Code: RHAMN Genus CN: buckthorn Genus Authority: L. Genus Summary: A genus of ca. 150 species, trees and shrubs, of the northern hemisphere. The recognition of Frangula as separate from Rhamnus is supported by molecular phylogeny (Bolmgren & Oxelman 2004). Genus References: Nesom in FNA (in prep.); Brizicky (1964a)=Z; Johnston (1975)=Y; Bolmgren & Oxelman (2004); Medan & Schirarend in Kubitzki (2004). [also see Frangula] Last Updated: 2019-11-29 Publish: 1