Flora of North America species comparison

1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose.

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

petiolate;

blades narrowly elliptic to oblanceolate, 30–90+ × 10–20+ mm, bases tapering, margins serrate to crenate-serrate (apices rounded to acute, 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; elliptic to lanceolate, often pinnatifid).

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

bracteate, distally tomentose.

conspicuously bracteate, sparsely to densely tomentose.

8 or 13;

corolla laminae 5–7+ mm.

8–10;

corolla laminae 9–10 mm.

45–60+;

corolla tubes 1.5–2 mm, limbs 1.5–2 mm.

60–70+;

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

13 or 21, light green, 3–5 mm, glabrous.

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

inconspicuous.

inconspicuous.

20–70(–100+) in corymbiform arrays.

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

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1.5–2.5 mm, usually hirtellous, sometimes glabrous;

pappi 6.5–7.5 mm.

= 44.

= 46, 92.