Flora of North America species comparison

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

1 or 2–3+, clustered, glabrous or leaf axils tomentose.

petiolate;

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

petiolate;

blades cordate to reniform, 20–60 × 20–60 mm, bases abruptly contracted or ± cordate, margins crenate to crenate-serrate (apices rounded, faces glabrous).

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

gradually reduced (petiolate or sessile, not clasping; blades oblong to lyrate, lateral lobes 2–4 pairs).

bracteate, distally tomentose.

bracteate, glabrous or sparsely tomentose.

8 or 13;

corolla laminae 5–7+ mm.

(8–)10–13;

corolla laminae 8–10+ mm.

45–60+;

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

55–70+;

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

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

13–21, green (tips purple or black), 6–8 mm, glabrous or sparsely tomentose proximally.

inconspicuous.

inconspicuous.

20–70(–100+) in corymbiform arrays.

6–20+ in corymbiform to subumbelliform arrays.

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 44.

= 44.