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, glabrous.

(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 orbiculate-ovate, orbiculate, obovate, or subreniform, 30–80+ × 30–80+ mm, bases cordate to contracted, margins crenate, dentate, or wavy.

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

abruptly reduced (proximal petiolate or sessile and clasping, broadly lanceolate, irregularly incised or crenate; mid ones sessile, clasping, sometimes auriculate, oblong to hastate, irregularly dentate; distal bractlike, entire).

0 (or relatively reduced, then densely tomentose).

conspicuously bracteate, glabrous.

(5–)8;

corolla laminae 8–10+ mm.

usually 8+, rarely 0;

corolla laminae 8–11 mm.

35–45+;

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

30–45+;

corolla tubes 4–5 mm, limbs 6–7 mm.

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

13, light green, 5–9+ mm, glabrous.

inconspicuous (bractlets red-tipped).

conspicuous.

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

3–8 in open, cymiform arrays.

1–1.5 mm, glabrous;

pappi 5–6 mm.

1.5–2 mm, glabrous;

pappi 9–10 mm.

= 46.