Cirsium arizonicum var. bipinnatum (Eastw.) D.J.Keil

Stems glabrous to tomentose, usually without septate trichomes. Leaf blades unlobed to deeply divided, faces glabrous to tomentose on one or both, usually without septate trichomes; main marginal spines slender to stout, 3–10 mm; cauline bases narrowed to truncate or clasping or decurrent as spiny wings to 30 mm. Involucres cylindric or ovoid to campanulate; spines of mid phyllaries 1–6 mm, slender to very stout. Corollas usually lavender to purple or reddish purple, 22–34 mm, tubes 7–12, throats 4–9 mm, lobes 8–18 mm; style tips 1.2–4.5 mm.