Flora of North America species comparison

1–10+, erect, glabrous.

1–10+, erect (usually simple), rough-puberulent or shortly spreading hirsute, or proximally glabrate.

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.

basal petioles 1.5–7 mm, blades spatulate to lanceolate or subrhombic, mostly 50–109 × 15–40 mm, bases tapering, glabrous, margins sharply serrate, ciliate, apices acuminate;

mid and distal sessile, blades lanceolate to subrhombic, much reduced distally, margins serrulate becoming entire distally, glabrous.

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

1–7, short-strigose;

bracts leaflike, 5–15 mm.

narrowly campanulate, 4.5–6 mm.

campanulate, 5–6 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

8–10(–15);

laminae 2–3.5 mm.

6–10;

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

20–60;

corollas 3.5–4.5 mm, lobes 1.5–2 mm.

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

(in 3–4 series) lanceolate, unequal (midnerves swollen), acute to acuminate (tips dark green).

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

15–50+ in compactly rounded corymbiform arrays, becoming paniculiform in robust plants.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

2–3 mm, sparsely strigose to glabrate;

pappi (of 12–22 bristles) about 3 mm.

= 18.

= 54.