Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils.

(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 orbiculate, ovate, or obovate, 40–100+ × 20–80+ mm, bases tapering, rounded, or abruptly contracted, margins crenate, dentate, or serrate.

gradually reduced (± sessile; lacerate to subcrenate).

gradually reduced (sessile, clasping; pinnatisect or sublyrate).

bracteate, glabrous.

bracteate, glabrous or proximally tomentose.

8–13;

corolla laminae 4–7 mm.

8–13(–21);

corolla laminae 7–10 mm.

50–70+;

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

40–50+;

corolla tubes 2–3 mm, limbs 2–3 mm.

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

13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally.

conspicuous.

conspicuous.

8–20+ in loose, corymbiform arrays.

6–15+ in open or congested, corymbiform arrays.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1–1.5 mm, glabrous or hirsute on ribs;

pappi 3–6 mm.

= 44.

= 44, 88, 90.