Flora of North America species comparison

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

usually 1, sometimes 2, densely tomentose (at least proximally), becoming glabrate distally.

(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).

(relatively leathery) sessile;

blades linear, 10–15+ × 1–2 mm, margins entire (revolute).

gradually reduced (± petiolate or sessile).

abruptly reduced (linear, bractlike).

bracteate, glabrous or sparsely tomentose.

bracteate, tomentose or glabrate.

8–10(–13);

corolla laminae 5–8+ mm.

0 or 5–8;

corolla laminae 4–7 mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

30–40+;

corolla tubes 2.5–3.5 mm, limbs 3.5–4 mm.

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

13, purple to deep reddish purple, 6–9+ mm, hairy or glabrescent.

inconspicuous.

conspicuous.

4–15+ in corymbiform arrays.

1(–2).

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

pappi 5–6 mm.

3–3.5 mm, hirtellous;

pappi 5–6 mm.

= 46.