Flora of North America species comparison

1, glabrous or leaf axils sparsely tomentose.

usually 1, sometimes 2–4, clustered, glabrous or sparsely tomentose proximally.

(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 usually broadly lanceolate to ovate, sometimes subhastate, 20–50+ × 20–40+ mm, bases truncate to subcordate or obtuse, margins crenate, denticulate, bluntly dentate, or sharply dentate (proximal cauline leaves petiolate; margins usually pinnately lobed to laciniate, sometimes subentire).

gradually reduced (± sessile; lacerate to subcrenate).

gradually reduced (becoming sessile, sometimes clasping).

bracteate, glabrous.

bracteate, glabrous.

8–13;

corolla laminae 4–7 mm.

0, 8, or 13;

corolla laminae 6–10+ mm.

50–70+;

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

70–80+;

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

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

(13–)21(–30+), light green, 3–8 mm, glabrous.

conspicuous.

inconspicuous.

8–20+ in loose, corymbiform arrays.

5–20+ in open or congested, subumbelliform arrays.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

1–1.5 mm, glabrous;

pappi 4.5–5.5 mm.

= 44.

= 40, 44, 46, 80.