Flora of North America species comparison

1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent.

1 or 2–3+, clustered, glabrous or leaf axils tomentose.

(thick, leathery) petiolate;

blades narrowly lanceolate or oblanceolate, 25–100+ × 5–20 mm, bases tapering, margins entire, subentire, dentate, or wavy (adaxial faces early glabrescent).

petiolate;

blades cordate to reniform, 20–60 × 20–60 mm, bases abruptly contracted or ± cordate, margins crenate to crenate-serrate (apices rounded, faces glabrous).

gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy).

gradually reduced (petiolate or sessile, not clasping; blades oblong to lyrate, lateral lobes 2–4 pairs).

0 (or relatively reduced, then densely tomentose).

bracteate, glabrous or sparsely tomentose.

(5–)8;

corolla laminae 8–10+ mm.

(8–)10–13;

corolla laminae 8–10+ mm.

35–45+;

corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.

55–70+;

corolla tubes 3–3.5 mm, limbs 2–2.5 mm.

(8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally.

13–21, green (tips purple or black), 6–8 mm, glabrous or sparsely tomentose proximally.

inconspicuous (bractlets red-tipped).

inconspicuous.

10–30+ in open or congested, cymiform arrays.

6–20+ in corymbiform to subumbelliform arrays.

1–1.5 mm, glabrous;

pappi 5–6 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 46.

= 44.