Cirsium arizonicum var. chellyense (R.J.Moore & Frankton) D.J.Keil

Stems glabrous or villous to tomentose with septate trichomes. Leaf blades deeply 1–2× divided, (lobes many, narrow, closely spaced), faces glabrous or abaxial villous along midveins with septate trichomes; main marginal spines usually very slender, 5–12 mm; cauline bases usually decurrent as spiny wings to 30 mm. Involucres cylindric to narrowly ovoid. Phyllary spines slender to ± stout, 1–20 mm. Corollas usually reddish purple, 25–32 mm, tubes 7–11, throats 4–7.5 mm, lobes 11–16 mm; style tips 2.5–3.5 mm. 2n = 34 (as C. chuskaense).