Flora of North America species comparison

1–10+, erect, glabrous.

1–20+, erect, glabrate proximally or sparsely strigoso-villous, becoming more densely so distal to mid stem.

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 0;

proximal to mid cauline usually withering by flowering, tapering to sessile bases, blades narrowly ovate-lanceolate, 50–190 × 5–30 mm, margins sharply serrate, 3-nerved, apices acuminate, abaxial faces glabrous or more commonly hairy along main nerves, adaxial glabrous or slightly scabrous;

mid to distal similar, 30–50(–120) × 8–12 mm, largest near mid stem, reduced distally, margins usually serrate or serrulate (teeth 3–8), sometimes entire proximal to arrays.

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

3–3.4 mm, bracteoles 0–3, linear-triangular.

narrowly campanulate, 4.5–6 mm.

narrowly campanulate, 1.7–2.5(–3) mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

(5–)8–14(–18);

laminae 0.5–1.5 × 0.15–0.3(–0.5) mm.

6–10;

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

(2–)3–6(–8);

corollas 2.2–2.8(–3) mm, lobes 0.4–0.8(–1) mm.

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

in 3–4 series, strongly unequal, acute to obtuse;

outer lanceolate, inner linear-lanceolate.

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

(70–)150–1300+, secund, in secund pyramidal-paniculiform arrays (obscurely so and club-shaped thyrsiform in small plants or shoots with small arrays), branches divergent and recurved, branches and peduncles hairy.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(narrowly obconic) 1–1.5 mm (ribbed), sparsely strigose;

pappi 1.8–2.2 mm.

= 18.