Flora of North America species comparison

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

1 (often cyanic), glabrous.

(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 turgid, abaxial faces cyanic) petiolate;

blades reniform to subreniform, 5–15+ × 5–25+ mm, bases abruptly contracted to cordate, margins usually crenate, sometimes wavy.

gradually reduced (weakly clasping, similar to basal).

abruptly reduced (1–4, sessile; bractlike, entire).

bracteate, glabrous or bases tomentose.

ebracteate, glabrous.

(8–)13;

corolla laminae 7–9 mm.

8 or 13;

corolla laminae 8–10+ mm.

35–50+;

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

40–50+;

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

(13–)21, green, 5–7 mm, glabrous.

13 or 21, deep red, 8–10+ mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

conspicuous (bractlets often cyanic).

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

borne singly.

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

pappi 3–4 mm.

1.5–2.5 mm, glabrous;

pappi 4–5.5 mm.

= 46.