Flora of North America species comparison

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

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

(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).

gradually reduced (± petiolate or sessile).

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

bracteate, glabrous or sparsely tomentose.

0 (or relatively reduced, then densely tomentose).

8–10(–13);

corolla laminae 5–8+ mm.

(5–)8;

corolla laminae 8–10+ mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

35–45+;

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

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

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

inconspicuous.

inconspicuous (bractlets red-tipped).

4–15+ in corymbiform arrays.

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

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

pappi 5–6 mm.

1–1.5 mm, glabrous;

pappi 5–6 mm.

= 46.

= 46.