Flora of North America species comparison

1 or 2–3, loosely clustered, glabrous.

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

(and proximal cauline) petiolate;

blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised.

(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 (petiolate or sessile and clasping; lanceolate, incised).

gradually reduced (weakly clasping, similar to basal).

ebracteate or inconspicuously bracteate, glabrous.

bracteate, glabrous or bases tomentose.

8 or 13;

corolla laminae 10–15+ mm.

(8–)13;

corolla laminae 7–9 mm.

30–45+;

corolla tubes 3–4 mm, limbs 3.5–4.5 mm.

35–50+;

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

(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.

(13–)21, green, 5–7 mm, glabrous.

conspicuous.

conspicuous (bractlets 2.5–4 mm).

8–15+ in corymbiform or subumbelliform arrays.

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

2.5–3.5 mm, glabrous;

pappi 5–7 mm.

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

pappi 3–4 mm.

= 46.

= 46.