Flora of North America species comparison

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

1, glabrous or leaf axils sparsely 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).

(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).

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

gradually reduced (± sessile; lacerate to subcrenate).

bracteate, distally tomentose.

bracteate, glabrous.

8 or 13;

corolla laminae 5–7+ mm.

8–13;

corolla laminae 4–7 mm.

45–60+;

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

50–70+;

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

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

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

inconspicuous.

conspicuous.

20–70(–100+) in corymbiform arrays.

8–20+ in loose, corymbiform arrays.

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

= 44.

= 44.