Flora of North America species comparison

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

1, glabrous or bases hairy.

(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.

(and proximal cauline, relatively turgid or leathery) petiolate;

blades reniform to suborbiculate, 40–70+ × 40–80+ mm, bases truncate to cordate, margins dentate or shallowly lobed.

gradually reduced (weakly clasping, similar to basal).

abruptly reduced (petiolate or sessile, oblanceolate, pinnatifid; distal sessile, bractlike).

bracteate, glabrous or bases tomentose.

ebracteate (or bractlets 1–2), glabrous.

(8–)13;

corolla laminae 7–9 mm.

13 or 21;

corolla laminae 10–12+ mm.

35–50+;

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

40–60+;

corolla tubes 3–4 mm, limbs 2.5–3.5 mm.

(13–)21, green, 5–7 mm, glabrous.

(13–)21, dark green with yellow margins, 8–11+ mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

0 or inconspicuous.

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

3–6+ in compact, cymiform arrays.

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

pappi 3–4 mm.

5–6 mm, glabrous;

pappi 5–7 mm.

= 46.