Flora of North America species comparison

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

1 (striated, frequently hollow, often pink- to purple-tinged), glabrous or leaf axils sparsely tomentose.

(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) obscurely petiolate;

blades obovate to oblanceolate, sometimes lyrate (lateral lobes to 5 pairs, terminal lobes larger than laterals), 50–150+ × 10–30+ mm, bases tapering, ultimate margins crenate to irregularly undulate.

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

gradually reduced (weakly clasping, similar to basal).

bracteate, glabrous or proximally tomentose.

bracteate, glabrous or bases tomentose.

8–13(–21);

corolla laminae 7–10 mm.

(8–)13;

corolla laminae 7–9 mm.

40–50+;

corolla tubes 2–3 mm, limbs 2–3 mm.

35–50+;

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

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

(13–)21, green, 5–7 mm, glabrous.

conspicuous.

conspicuous (bractlets 2.5–4 mm).

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

8–30+ in umbelliform or cymiform arrays (robust plants with multiple arrays).

1–1.5 mm, glabrous or hirsute on ribs;

pappi 3–6 mm.

1–1.5 mm, sparsely hirtellous on ribs or glabrous;

pappi 3–4 mm.

= 44, 88, 90.

= 46.