Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

usually 1, sometimes multiple, bases and leaf axils tomentose, otherwise glabrous.

(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).

(and proximal cauline) petiolate;

blades oblanceolate to obovate or lyrate (pinnately lobed to pinnatifid, terminal lobes larger than laterals), 10–30+ × 10–20+ mm, bases tapering, ultimate margins ± crenate to serrate.

gradually reduced (± sessile; lacerate to subcrenate).

gradually to abruptly reduced (sessile; pinnatisect or entire).

bracteate, glabrous.

bracteate (bractlets purple-tinged), glabrous or glabrate.

8–13;

corolla laminae 4–7 mm.

0 (rarely) or 10–12;

corolla laminae 8–10 mm.

50–70+;

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

45–60+;

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

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

13, green (sometimes purple-tinged distally), 6–8 mm, glabrous.

conspicuous.

0 or inconspicuous (bractlets purple-tinged).

8–20+ in loose, corymbiform arrays.

1–2(–5+) in cymiform arrays.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1.5–2.5 mm, hirtellous on ribs;

pappi 6–7 mm.

= 44.

= 46.