Flora of North America species comparison

1, glabrous or leaf axils tomentose.

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

(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).

petiolate;

blades usually broadly lanceolate to ovate, sometimes subhastate, 20–50+ × 20–40+ mm, bases truncate to subcordate or obtuse, margins crenate, denticulate, bluntly dentate, or sharply dentate (proximal cauline leaves petiolate; margins usually pinnately lobed to laciniate, sometimes subentire).

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

gradually reduced (becoming sessile, sometimes clasping).

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

bracteate, glabrous.

8–10+;

corolla laminae 10–15+ mm.

0, 8, or 13;

corolla laminae 6–10+ mm.

45–60+;

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

70–80+;

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

13 or 21, green, 7–9+ mm, glabrous.

(13–)21(–30+), light green, 3–8 mm, glabrous.

inconspicuous.

inconspicuous.

15–50+ in corymbiform arrays.

5–20+ in open or congested, subumbelliform arrays.

2–2.5 mm, glabrous;

pappi 6–7 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 46.

= 40, 44, 46, 80.