Flora of North America species comparison

1–10+, erect, glabrous.

1–5(–10), ascending to erect (tall stems sometimes arching), branching proximal to arrays only in damaged stems, glabrous.

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 subsessile to winged-petiolate, petioles of proximalmost nearly completely sheathing stems, blades oblanceolate to elliptic-lanceolate, 60–600 × 3–20(–50) mm, thick and firm, obtuse to rounded, bases tapering, margins entire or obscurely serrate, glabrous;

proximal to distal cauline sessile, ascending to nearly appressed, lanceolate-oblong to linear, 10–30 × 2–4 mm, abruptly reduced proximally, then gradually so distally, margins entire, apices acute, faces glabrous.

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

slender, 2–10 mm, glabrous or sparsely strigillose;

bracteoles linear.

narrowly campanulate, 4.5–6 mm.

narrowly campanulate, 4–6 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

3–7, 1.5–2 × ca. 0.5 mm.

6–10;

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

usually 8–12;

corollas 3–5 mm, lobes 1–1.2 mm.

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

in 3–4 series, oblong, unequal, acute to rounded, glabrous.

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

15–250, sometimes secund on proximal branches and secund terminus, in linear, narrowly elongate paniculiform to elongate pyramidal-secund or thyrsiform-paniculiform and not secund arrays, sometimes with a few elongate proximal, arching branches.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

1.5–2.5 mm, sparsely to moderately strigose;

pappi 3 mm.

= 18.