Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

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

(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).

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 (± sessile; lacerate to subcrenate).

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

bracteate, glabrous.

bracteate, glabrous or sparsely tomentose.

8–13;

corolla laminae 4–7 mm.

(8–)10–13;

corolla laminae 8–10+ mm.

50–70+;

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

55–70+;

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

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

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

conspicuous.

inconspicuous.

8–20+ in loose, corymbiform arrays.

6–20+ in corymbiform to subumbelliform arrays.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 44.

= 44.