Flora of North America species comparison

erect or ascending, stout, 10–150 cm.

erect or ascending, 30–150 cm.

faces glabrous or nearly so or abaxial ± villous with septate trichomes.

faces thinly to densely arachnoid-tomentose, especially abaxially, and villous or tomentose with septate trichomes, especially along midveins, adaxially ± glabrate.

2–4 cm, loosely to densely villous with septate trichomes and thinly arachnoid with non-septate trichomes.

2.5–3.5 cm, densely tomentose with septate trichomes (individual phyllaries obscured by tomentum).

pink to purple, 21–25 mm, tubes 6.5–8 mm, throats 8–11.5 mm, lobes 5.5–7 mm.

yellow (northern populations) or pink to pale purple (southern populations), 13–18 mm, tubes 6–9 mm, throats 3–5.5 mm, lobes 3–7 mm.

green;

outer with few or no lateral spines;

apical spines stout.

outer with stiff lateral spines;

apical spines slender.

several–many, usually subsessile or short-pedunculate, crowded in erect, spiciform or racemiform arrays, less commonly openly branched.

sessile or short-pedunculate in usually nodding, densely woolly-tomentose, spiciform or racemiform arrays.

17–22 mm.

10–15 mm.

= 34 (as C. peckii).

= 34 (as C. scopulorum).