A genus of about 100-110 species, herbs and shrubs, primarily of sw. North America and Mexico south into Central America. Kuhnia should be included within a broadly circumscribed Brickellia (Schilling et al. 2015; King & Robinson 1987; Shinners 1971). In a molecular analysis (Schilling et al. 2015), B. cordifolia is basalmost in a clade that makes up Brickellia s.s., while B. eupatorioides is in a clade that corresponds to the formerly recognized Kuhnia.
Ref: Cronquist (1980); King & Robinson (1987); Nesom (2022c); Schilling et al. (2015); Scott (2006) In Flora of North America Editorial Committee (2006c); Shinners (1946); Shinners (1971a); Turner (1989). Show full citations.