Flora of North America species comparison

1–10+, erect, glabrous.

1–5+, ascending to erect, slender, essentially glabrous;

axillary clusters of small leaves present in distal leaf axils.

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 often withering by flowering, tapering to petiolar bases, blades oblanceolate, largest blades 80–170 × 10–20 mm, margins entire or slightly toothed, ± strongly 3-nerved, apices acute;

mid and distal cauline ascending to erect, blades linear-lanceolate, greatly reduced, becoming bractlike in arrays, less prominently or scarcely 3-nerved, glabrous.

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

1–3(–5) mm;

bracts linear-lanceolate, 1–3 mm, glabrous.

narrowly campanulate, 4.5–6 mm.

campanulate, 3–5 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

5–8;

laminae 1–2 × 0.5–0.75 mm.

6–10;

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

3–9;

corollas 3–4 mm, lobes 0.5–0.75 mm.

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

in 3 series, strongly unequal, broadly lanceolate, acute, glabrous.

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

35–140, in paniculiform arrays, often about as broad as long, branches recurved-secund, often elongate.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(obconic) 1.5–2 mm, glabrous;

pappi 1.5–2 mm.

= 18.

= 18.