Berberis canadensis P. Miller. Phen: Apr-May; Sep-Oct. Hab: Rocky woods, forest openings, glades, usually over mafic rocks (such as diabase) or calcareous rocks (such as limestone), sometimes along fence-rows in sw. VA (presumably spread by birds). Dist: A broad Southern Appalachian-Ozarkian endemic, not occurring in Canada (the epithet a misnomer): scattered and local in VA, WV, KY, TN, NC, SC, AL, GA, MO, IL, IN, and sc. PA (where apparently now extirpated).
Origin/Endemic status: Native
Other Comments: Along with Berberis vulgaris, Berberis canadensis was subjected to organized eradication programs because of its serving as an alternate host for wheat rust (Puccinia graminis).
Synonymy: = C, F, FNA3, G, Il, K1, K3, K4, Pa, RAB, S, Tn, Va, W