Flora of North America species comparison

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

1, 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) 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 (± petiolate or sessile).

gradually reduced (± sessile; lacerate to subcrenate).

bracteate, glabrous or sparsely tomentose.

bracteate, glabrous.

8–10(–13);

corolla laminae 5–8+ mm.

8–13;

corolla laminae 4–7 mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

50–70+;

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

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

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

inconspicuous.

conspicuous.

4–15+ in corymbiform arrays.

8–20+ in loose, corymbiform arrays.

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

pappi 5–6 mm.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

= 46.

= 44.