Flora of North America species comparison

1–10+, erect, glabrous.

1–5+, flexuous, sparsely to 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;

basal and proximal cauline tapering to winged petioles, blades ovate, (70–)100–140(–180) × (27–)40–60(–80) mm (petioles 1/4–1/2 total leaf length), margins serrate-serrulate [teeth (14–)21–33(–45)], abaxial faces glabrous or moderately hairy, more densely so on nerves, adaxial glabrous or sparsely hairy;

mid to distal cauline sessile, blades narrowly ovate to lanceolate, 38–90(–150) × 10–30(–55) mm, reduced distally, becoming lanceolate in arrays, bases tapering, margins entire to serrate, apices acuminate to cuspidate, faces glabrous or sparsely hairy, abaxial glabrous or moderately hairy, more densely so along nerves.

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

0.5–5 mm, moderately to densely strigose;

bracteoles 1–3, lanceolate, usually near base of involucres and grading into phyllaries.

narrowly campanulate, 4.5–6 mm.

campanulate, 4.5–7(–8) mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

1–5;

laminae (2–)2.5–4(–5) × 0.7–2 mm.

6–10;

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

4–8(–11);

corollas 2–3(–4) mm, lobes 1–1.6(–2) mm.

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

in ca. 3 series, strongly unequal, outermost 1–2 mm, innermost 3.7–4.7(–5.7) mm, linear-oblong, 1-nerved, apices obtuse to acute.

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

25–250, in short axillary and terminal racemiform clusters, lateral panicles (2–)7–31(–56) cm.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(obconic) 1–2(–3) mm, moderately to densely strigose;

pappi 3–4.5 mm.

= 18.

= 18, 36.