Flora of North America species comparison

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

1, 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.

petiolate;

blades orbiculate-ovate, orbiculate, obovate, or subreniform, 30–80+ × 30–80+ mm, bases cordate to contracted, margins crenate, dentate, or wavy.

gradually reduced (weakly clasping, similar to basal).

abruptly reduced (proximal petiolate or sessile and clasping, broadly lanceolate, irregularly incised or crenate; mid ones sessile, clasping, sometimes auriculate, oblong to hastate, irregularly dentate; distal bractlike, entire).

bracteate, glabrous or bases tomentose.

conspicuously bracteate, glabrous.

(8–)13;

corolla laminae 7–9 mm.

usually 8+, rarely 0;

corolla laminae 8–11 mm.

35–50+;

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

30–45+;

corolla tubes 4–5 mm, limbs 6–7 mm.

(13–)21, green, 5–7 mm, glabrous.

13, light green, 5–9+ mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

conspicuous.

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

3–8 in open, cymiform arrays.

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

pappi 3–4 mm.

1.5–2 mm, glabrous;

pappi 9–10 mm.

= 46.