Flora of North America species comparison

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

1, glabrous or bases hairy.

(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.

(and proximal cauline, relatively turgid or leathery) petiolate;

blades reniform to suborbiculate, 40–70+ × 40–80+ mm, bases truncate to cordate, margins dentate or shallowly lobed.

gradually reduced (sessile, clasping; pinnatisect or sublyrate).

abruptly reduced (petiolate or sessile, oblanceolate, pinnatifid; distal sessile, bractlike).

bracteate, glabrous or proximally tomentose.

ebracteate (or bractlets 1–2), glabrous.

8–13(–21);

corolla laminae 7–10 mm.

13 or 21;

corolla laminae 10–12+ mm.

40–50+;

corolla tubes 2–3 mm, limbs 2–3 mm.

40–60+;

corolla tubes 3–4 mm, limbs 2.5–3.5 mm.

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

(13–)21, dark green with yellow margins, 8–11+ mm, glabrous.

conspicuous.

0 or inconspicuous.

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

3–6+ in compact, cymiform arrays.

1–1.5 mm, glabrous or hirsute on ribs;

pappi 3–6 mm.

5–6 mm, glabrous;

pappi 5–7 mm.

= 44, 88, 90.