Flora of North America species comparison

1, glabrous or leaf axils tomentose.

1 or 2–3, clustered, floccose-tomentose proximally and in leaf axils, otherwise sparsely tomentose or glabrescent.

(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).

(and proximal cauline) petiolate;

blades narrowly elliptic to elliptic-ovate or oblanceolate to suborbiculate or sublyrate, 20–70+ × 10–30+ mm, bases tapering to rounded or abruptly contracted, margins subentire to crenate, serrate-dentate, or pinnately lobed (abaxial faces floccose-tomentose, especially along midribs, ± glabrescent).

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

gradually reduced (petiolate, sublyrate or pinnatisect, abaxial faces sparsely hairy; distals sessile, subentire to irregularly dissected).

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

conspicuously bracteate, sparsely to densely tomentose.

8–10+;

corolla laminae 10–15+ mm.

8–10;

corolla laminae 9–10 mm.

45–60+;

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

60–70+;

corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.

13 or 21, green, 7–9+ mm, glabrous.

13 or 21, green (tips sometimes cyanic), 5–6+ mm, densely tomentose proximally, glabrescent distally.

inconspicuous.

inconspicuous.

15–50+ in corymbiform arrays.

6–20+ in open or congested, corymbiform arrays.

2–2.5 mm, glabrous;

pappi 6–7 mm.

1.5–2.5 mm, usually hirtellous, sometimes glabrous;

pappi 6.5–7.5 mm.

= 46.

= 46, 92.