"Buckbrush" . . "Rhamnaceae" . "Magnoliopsida" . "Plantae" . . . . . . . "Rosales" . . . . . . "Magnoliophyta" . . "(Hook.) Nutt." . "Ceanothus" . . "Ceanothus cuneatus" . . "Ceanothus cuneatus (Hook.) Nutt." .