Flora of North America species comparison

1 (at ends of rhizomes), ascending to erect, glabrate proximally to sparsely to densely strigoso-puberulent distally.

1, ascending-erect, softly short villous.

basal and proximal cauline often persisting to flowering, gradually tapering to winged petioles, blades linear oblanceolate to oblanceolate, rarely spatulate, 50–120 × 8–30 mm, proximalmost much smaller, margins entire to sharply serrate, faces glabrate to moderately scabroso-strigose;

mid and distal cauline sessile or subsessille, blades elliptic to oblanceolate or obovate, 10–50 × 3–12 mm, mid tapering to bases, somewhat to strongly 3-nerved, largest, usually much reduced distally, margins entire or sometimes distally serrate, apices acute, faces sparsely to densely strigoso-puberulent, sometimes softly so.

basal and proximal cauline winged-petiolate petioles (petioles 1/2+ leaf length), blades broadly ovate (or subcordate) to elliptic, 50–100(–160) × 30–40 mm, margins shallowly serrate-crenate, apices acute to obtuse, soft short-villous;

mid and distal cauline subpetiolate or sessile, blades ovate to elliptic, 20–40 × 5–15 mm, greatly reduced, becoming narrowly elliptic.

1–6 mm, sparsely to densely strigillose;

bracteoles 0–5, sometimes clustered near to and grading into phyllaries, linear-lanceolate.

slender.

campanulate, 3.5–6 mm.

campanulate, 4–5 mm.

6–12;

laminae 2.9–6.3 × 0.3–0.7(–1) mm.

usually 7–12;

laminae 3–6 × 1.5–2 mm.

5–17;

corollas 3.5–6 mm, lobes 0.8–1.7 mm.

usually 14–27;

corolla tubes 4 mm, lobes 0.8–1 mm.

in 3–5 series, lanceolate to oblong, strongly unequal, acute or sometimes obtuse, glabrous or sparsely strigillose.

in 3–4 series, broadly lanceolate, unequal, glabrate or sparsely short-strigose.

(2–)30–500, in narrow to broad, thyrsiform to secund-pyramidal paniculiform arrays, branches recurved, secund, congested to lax.

50–100, in paniculiform arrays, proximal branches obscurely to evidently recurved-secund.

0.7–2.7 mm, sparsely to densely strigillose;

pappi 2.5–4.7 mm.

1.5–2.5, sparsely strigose;

pappi ± 3 mm (shorter than corollas).

= 18.