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 multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes 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).

(and proximal cauline, relatively thick and turgid) petiolate;

blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).

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

gradually reduced (± petiolate or sessile).

0 (or relatively reduced, then densely tomentose).

bracteate, glabrous or sparsely tomentose.

(5–)8;

corolla laminae 8–10+ mm.

8–10(–13);

corolla laminae 5–8+ mm.

35–45+;

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

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

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

13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.

inconspicuous (bractlets red-tipped).

inconspicuous.

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

4–15+ in corymbiform arrays.

1–1.5 mm, glabrous;

pappi 5–6 mm.

1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;

pappi 5–6 mm.

= 46.

= 46.