Flora of North America species comparison

1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose.

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

petiolate;

blades narrowly elliptic to oblanceolate, 30–90+ × 10–20+ mm, bases tapering, margins serrate to crenate-serrate (apices rounded to acute, faces glabrous).

(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 (petiolate or sessile; elliptic to lanceolate, often pinnatifid).

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

bracteate, distally tomentose.

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

8 or 13;

corolla laminae 5–7+ mm.

0 (rarely) or 10–12;

corolla laminae 8–10 mm.

45–60+;

corolla tubes 1.5–2 mm, limbs 1.5–2 mm.

45–60+;

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

13 or 21, light green, 3–5 mm, glabrous.

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

inconspicuous.

0 or inconspicuous (bractlets purple-tinged).

20–70(–100+) in corymbiform arrays.

1–2(–5+) in cymiform arrays.

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1.5–2.5 mm, hirtellous on ribs;

pappi 6–7 mm.

= 44.

= 46.