Flora of North America species comparison

1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils.

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

(and proximal cauline) petiolate;

blades orbiculate, ovate, or obovate, 40–100+ × 20–80+ mm, bases tapering, rounded, or abruptly contracted, margins crenate, dentate, or serrate.

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, clasping; pinnatisect or sublyrate).

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

bracteate, glabrous or proximally tomentose.

usually bracteate, sometimes ebracteate, glabrous.

8–13(–21);

corolla laminae 7–10 mm.

0, 8, or 13;

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

40–50+;

corolla tubes 2–3 mm, limbs 2–3 mm.

50–65+;

corolla tubes 2–3 mm, limbs 2–3 mm.

13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally.

13 or 21, green, 5–8+ mm, glabrous.

conspicuous.

inconspicuous.

6–15+ in open or congested, corymbiform arrays.

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

1–1.5 mm, glabrous or hirsute on ribs;

pappi 3–6 mm.

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

pappi 3.5–4.5 mm.

= 44, 88, 90.

= 44, 46, 92.