Flora of North America species comparison

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

1 (striated, frequently hollow, often pink- to purple-tinged), 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) obscurely petiolate;

blades obovate to oblanceolate, sometimes lyrate (lateral lobes to 5 pairs, terminal lobes larger than laterals), 50–150+ × 10–30+ mm, bases tapering, ultimate margins crenate to irregularly undulate.

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

gradually reduced (weakly clasping, similar to basal).

bracteate, distally tomentose.

bracteate, glabrous or bases tomentose.

8 or 13;

corolla laminae 5–7+ mm.

(8–)13;

corolla laminae 7–9 mm.

45–60+;

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

35–50+;

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

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

(13–)21, green, 5–7 mm, glabrous.

inconspicuous.

conspicuous (bractlets 2.5–4 mm).

20–70(–100+) in corymbiform arrays.

8–30+ in umbelliform or cymiform arrays (robust plants with multiple arrays).

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1–1.5 mm, sparsely hirtellous on ribs or glabrous;

pappi 3–4 mm.

= 44.

= 46.