Flora of North America species comparison

1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose.

1 (often branched proximally, sometimes distally), sparsely to densely floccose-tomentose.

(and proximal cauline, relatively thick and turgid) petiolate;

blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).

petiolate;

blades elliptic to oblanceolate or ovate, 20–80+ × 20–60+ mm, bases tapering, margins entire, crenate-serrate, or irregularly to pinnately lobed (abaxial faces white-tomentose, adaxials patchy tomentose to glabrate).

gradually reduced (± petiolate or sessile).

gradually to abruptly reduced (sessile; mids lanceolate to oblanceolate, irregularly serrate to pinnately lobed, distals bractlike).

bracteate, glabrous or sparsely tomentose.

bracteate, ± tomentose.

8–10(–13);

corolla laminae 5–8+ mm.

10–13+;

corolla laminae 8–12+ mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

60–70+;

corolla tubes 1–1.5 mm, limbs 2–2.5 mm.

13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.

13 or 21, green (sometimes with purple streaks, tips usually purple), 4–8 mm, proximally tomentose, rarely glabrous.

inconspicuous.

conspicuous (bractlets purple-tinged).

4–15+ in corymbiform arrays.

1(–3).

1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;

pappi 5–6 mm.

1–1.5 mm, glabrous;

pappi 2.5–3 mm.

= 46.

= 92.