Flora of North America species comparison

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

1, sparsely to densely tomentose or glabrescent.

petiolate;

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

(and proximal) petiolate;

blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).

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

gradually reduced (distal sessile, bractlike).

usually bracteate, sometimes ebracteate, glabrous.

inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.

0, 8, or 13;

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

8(–13);

corolla laminae 8–10+ mm.

50–65+;

corolla tubes 2–3 mm, limbs 2–3 mm.

30–40+;

corolla tubes 2.5–3.5 mm, limbs 2–3 mm.

13 or 21, green, 5–8+ mm, glabrous.

13 or 21, green, 5–7+ mm, glabrous.

inconspicuous.

0 or inconspicuous.

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

6–15+ in corymbiform arrays.

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

pappi 3.5–4.5 mm.

1.5–2 mm, glabrous;

pappi 4–5 mm.

= 44, 46, 92.

= 46, 92.