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 2–4, loosely clustered, glabrous or sparsely tomentose proximally.

(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 lanceolate to narrowly elliptic or oblanceolate, 30–60+ × 10–20+ mm, bases tapering, sometimes obtuse, margins subentire to dentate or serrate.

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

gradually reduced (proximals petiolate, sublyrate; mids sessile, not clasping, lanceolate, dissected, incised, or lacerate; distals sessile, bractlike).

0 (or relatively reduced, then densely tomentose).

usually bracteate, sometimes ebracteate, glabrous.

(5–)8;

corolla laminae 8–10+ mm.

0, 8, or 13;

corolla laminae (pale yellow) 5–10+ mm.

35–45+;

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

50–65+;

corolla tubes 2–3 mm, limbs 2–3 mm.

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

13 or 21, green, 5–8+ mm, glabrous.

inconspicuous (bractlets red-tipped).

inconspicuous.

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

2–10+ in loose or compact, corymbiform arrays.

1–1.5 mm, glabrous;

pappi 5–6 mm.

1–2 mm, usually glabrous, sometimes hispidulous on ribs;

pappi 3.5–4.5 mm.

= 46.

= 44, 46, 92.