Flora of North America species comparison

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

1, glabrous or leaf axils tomentose.

(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.

(and proximal cauline) petiolate;

blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous).

gradually reduced (weakly clasping, similar to basal).

gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow).

bracteate, glabrous or bases tomentose.

usually ebracteate (rarely with 1–2 bractlets), glabrous.

(8–)13;

corolla laminae 7–9 mm.

8–10+;

corolla laminae 10–15+ mm.

35–50+;

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

45–60+;

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

(13–)21, green, 5–7 mm, glabrous.

13 or 21, green, 7–9+ mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

inconspicuous.

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

15–50+ in corymbiform arrays.

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

pappi 3–4 mm.

2–2.5 mm, glabrous;

pappi 6–7 mm.

= 46.

= 46.