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 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils.

(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 spatulate to oblanceolate, or ovate to orbiculate, 20–40+ × 10–30+ mm, bases tapering to abruptly contracted or subcordate, margins entire, crenate, dentate, or weakly lobulate (faces usually glabrous, sometimes hairy).

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

gradually to abruptly reduced (± petiolate or sessile; entire or subentire).

0 (or relatively reduced, then densely tomentose).

bracteate, glabrous or sparsely tomentose.

(5–)8;

corolla laminae 8–10+ mm.

8 or 13;

corolla laminae 5–10 mm.

35–45+;

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

35–60+;

corolla tubes 2–4 mm, limbs 2.5–4 mm.

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

(8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous.

inconspicuous (bractlets red-tipped).

conspicuous.

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

2–20+ in loose, corymbiform or subumbelliform arrays.

1–1.5 mm, glabrous;

pappi 5–6 mm.

1–2.5 mm, glabrous;

pappi 3–6 mm.

= 46.

= 46, 92.