Flora of North America species comparison

1 (striated, frequently hollow, often pink- to purple-tinged), glabrous or leaf axils sparsely tomentose.

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

(and proximal cauline) obscurely petiolate;

blades obovate to oblanceolate, sometimes lyrate (lateral lobes to 5 pairs, terminal lobes larger than laterals), 50–150+ × 10–30+ mm, bases tapering, ultimate margins crenate to irregularly undulate.

(relatively leathery) sessile;

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

gradually reduced (weakly clasping, similar to basal).

abruptly reduced (linear, bractlike).

bracteate, glabrous or bases tomentose.

bracteate, tomentose or glabrate.

(8–)13;

corolla laminae 7–9 mm.

0 or 5–8;

corolla laminae 4–7 mm.

35–50+;

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

30–40+;

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

(13–)21, green, 5–7 mm, glabrous.

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

conspicuous (bractlets 2.5–4 mm).

conspicuous.

8–30+ in umbelliform or cymiform arrays (robust plants with multiple arrays).

1(–2).

1–1.5 mm, sparsely hirtellous on ribs or glabrous;

pappi 3–4 mm.

3–3.5 mm, hirtellous;

pappi 5–6 mm.

= 46.