Flora of North America species comparison

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

1, glabrous or leaf axils sparsely tomentose.

(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) petiolate;

blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute).

gradually reduced (weakly clasping, similar to basal).

gradually reduced (± sessile; lacerate to subcrenate).

bracteate, glabrous or bases tomentose.

bracteate, glabrous.

(8–)13;

corolla laminae 7–9 mm.

8–13;

corolla laminae 4–7 mm.

35–50+;

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

50–70+;

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

(13–)21, green, 5–7 mm, glabrous.

13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.

conspicuous (bractlets 2.5–4 mm).

conspicuous.

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

8–20+ in loose, corymbiform arrays.

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

pappi 3–4 mm.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

= 46.

= 44.