Flora of North America species comparison

1–10+, erect, glabrous.

1–5+, ascending to erect, glabrous or moderately hairy in arrays.

basal and proximal cauline usually withering by flowering (other rosettes may be present), tapering to long, winged petioles, blades often recurved, linear- lanceolate or -oblanceolate, 100–240 × 8–16 mm, folded along midrib (V-shaped in cross section), bases usually with (2–)3–8 prominent lateral nerves, apices acute to obtuse, faces glabrous;

mid to distal cauline sessile, blades recurved, linear-lanceolate, 50–70 × 8–11 mm, reduced distally, folded, bases with prominent lateral nerves.

rosettes present at flowering, often in large numbers;

basal and proximal cauline tapering to long-winged petioles, blades oblanceolate to elongate-elliptic, 140–300 (including petioles) × 33–63 mm, gradually reduced distally, somewhat fleshy-rubbery (fresh), margins serrate (teeth 8–18), apices acuminate, abaxial faces glabrous, adaxial glabrous or sparsely strigose;

mid to distal cauline sessile, blades narrowly lanceolate, 35–72 × 9–16 mm, gradually reduced into arrays, tapering to bases, margins entire to slightly serrate, apices acuminate, faces glabrous or sparsely hairy.

2.8–4 mm, moderately short-hispido-strigose, lanceolate bracteoles 0–1.

5–12 mm, glabrate to sparsely strigose;

bracteoles 0(–1).

narrowly campanulate, 4.5–6 mm.

campanulate, 10–11 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

6–13;

laminae 3.3–5 × (1.5–)2–3(–3.5) mm.

6–10;

corollas 4.5–5.2 mm, lobes 0.7–1.8 mm.

12–29;

corollas 3.7–5.1 mm, lobes 1.5–2.3 mm.

(14–18) in 3–4 series, unequal, obtuse, broad, striations weak, obtuse to rounded, glabrous.

in 3–4 series, unequal, outermost ovate, 2.3–3.6 mm, 1-nerved, apices obtuse to acute, innermost linear-oblong, 1–3-nerved (on at least some involucres), apices obtuse to blunt.

30–450 in corymbiform to somewhat paniculiform with rounded corymbiform branches (robust plants) arrays, branches and peduncles strigillose.

20–230 (1–10 per branch), in leafy, short, axillary and terminal, racemo-paniculiform clusters 8–41(–47) cm.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(obconic) 2–2.6 mm, glabrous or sparsely strigose;

pappi 4.8–5.7 mm.

= 18.

= 108, 126.