Flora of North America species comparison

arachno-tomentose to sericeous-lanate (especially on abaxial faces of phyllaries), unevenly glabrescent.

(somewhat sticky) hairy or unevenly glabrate.

single (turgid).

single (often branching distally).

evenly distributed (proximal withering before flowering);

subsessile or petiolate;

blades obovate to oblanceolate, 5–15(–25) × 2–6(–10) cm, bases tapered, margins serrate-dentate to denticulate or subentire (distal leaves slightly smaller).

evenly distributed;

petiolate (petiole bases ± expanded);

blades obovate (lyrate to pinnatifid, lobes linear to ± cruciate), 3–8 × 1.5–3.5 cm, bases contracted or tapered, ultimate margins ± dentate to crenate.

usually ± 21, rarely 0;

corolla laminae 20–25 mm.

± 13;

corolla laminae (deep red to purple) 10–15 mm.

± 21, 8–15 mm (sometimes purplish or pinkish-tinged), tips greenish.

± 13+, 6–10 mm, tips black.

of 6–10 linear bractlets (longest nearly equaling phyllaries).

of 8–14 ± ovate bractlets (lengths to 1/2 phyllaries).

1–5(–15+) in corymbiform arrays (involucres notably large, 20–40 mm diam.).

8–20 in corymbiform arrays.

glabrous.

usually hairy.

= 40.

= 20.