Key to Berberis varieties concinna and extensiflora

1a. Flowers solitary without bracts on the middle of pedicel. Inflorescence 0.8–1.5 cm long __________________________________________________________________ var. concinna

1b. Flowers 2–3 [sic], usually in umbels, if solitary subtended by bracteoles [sic] on the middle of pedicel. Inflorescence 2–5 cm long ________________________ var. extensiflora