Flora of North America species comparison

1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose.

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

(and proximal cauline, relatively thick and turgid) petiolate;

blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).

(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.

gradually reduced (± petiolate or sessile).

gradually reduced (weakly clasping, similar to basal).

bracteate, glabrous or sparsely tomentose.

bracteate, glabrous or bases tomentose.

8–10(–13);

corolla laminae 5–8+ mm.

(8–)13;

corolla laminae 7–9 mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

35–50+;

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

13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.

(13–)21, green, 5–7 mm, glabrous.

inconspicuous.

conspicuous (bractlets 2.5–4 mm).

4–15+ in corymbiform arrays.

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

1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;

pappi 5–6 mm.

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

pappi 3–4 mm.

= 46.

= 46.