Flora of North America species comparison

1–10+, erect, glabrous.

1–50+, erect, glabrous or sometimes sparsely strigose in arrays;

fascicles of small lateral branch leaves often present in 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.

proximal cauline tapering to long, winged petioles, blades oblanceolate to linear-oblanceolate, 50–100(–200) (including petiole) × (5–)10–20(–30) mm, margins entire to serrulate, usually 3-nerved (2 larger lateral nerves), apices acute, mucronate to acuminate and somewhat spinulose, glabrous;

mid to distal cauline sessile, blades lanceolate to linear, 40–60 × (2–)4–14 mm, rapidly reduced distally, margins entire, ciliate, faces glabrous.

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

1.4–5 mm, glabrous or sparsely strigose;

bracteoles 0–3+, linear to lanceolate.

narrowly campanulate, 4.5–6 mm.

narrowly to broadly campanulate, 2.5–4.5 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

5–14;

laminae 1.5–2(–4) × 0.2–0.5(–0.75) mm.

6–10;

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

(6–)8–20;

corollas (2–)3–4 mm, lobes 0.4–1 mm.

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

in 3–4 series, strongly unequal, margins ciliate-fimbriate, especially apically;

outer ovate to lanceolate, acute to rounded, inner linear-ovate to oblong or linear-lanceolate, obtuse to rounded.

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

10–210 in paniculiform arrays, broadly secund-pyramidal or more rhombic to transversely rhombic, (1.5–)3–12(–20) × (1.5–)3–12 cm;

branches glabrous with secund heads spreading and arching, sometimes ascending with non-secund heads.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(obconic) 1–2 mm, glabrous or sparsely strigose;

pappi 2.5–3 mm.

= 18.

= 18, 36.