Flora of North America species comparison

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

usually 1 (sometimes more, clustered), glaucous.

(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 thick and turgid) petiolate;

blades lanceolate to narrowly oblanceolate, 30–100+ × 10–20+ mm, bases tapering, margins entire or subentire.

gradually reduced (weakly clasping, similar to basal).

gradually reduced (sessile and weakly clasping; lanceolate, entire).

bracteate, glabrous or bases tomentose.

conspicuously bracteate, glaucous.

(8–)13;

corolla laminae 7–9 mm.

8–10(–13);

corolla laminae 5–7 mm.

35–50+;

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

25–40+;

corolla tubes 2–3 mm, limbs 3–4 mm.

(13–)21, green, 5–7 mm, glabrous.

(13) 21, green (tips often purple), glabrous.

conspicuous (bractlets 2.5–4 mm).

conspicuous.

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

12–20+ in open, corymbiform arrays.

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

pappi 3–4 mm.

1–1.5 mm, glabrous;

pappi 5–6 mm.

= 46.

= 46.