Flora of North America species comparison

1–10+, erect, glabrous.

1–10+, ascending-erect, glabrous, often short fascicles of leaves present at nodes in axes of distal cauline leaves.

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 elongate, winged petioles, bases nearly sheathing stems, blades linear-lanceolate, 50–260 (including petiole) × 5–45 mm, somewhat fleshy (fresh), margins entire, faces glabrous;

mid and distal cauline crowded (robust plants), sessile, blades linear-lanceolate to lanceolate, 20–130 × 5–10(–25) mm, reduced distally, margins entire, apices acute to attenuate, glabrous.

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

2–8 mm, glabrous or sparsely strigose;

bracteoles 1–3, distally grading into phyllaries.

narrowly campanulate, 4.5–6 mm.

campanulate, 2.5–4 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

8–12;

laminae 1–2.5 × 1 mm.

6–10;

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

10–20;

corollas 3–4 mm, lobes 1–1.5 mm.

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

in 3–4 series, linear-triangular, unequal, margins involute near tip, sharply acute, the outer 1/3–2/3 length of inner (1–3 × 0.4–0.9 mm), midribs usually enlarged and translucent.

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

70–320, usually not secund, in thyrsiform-paniculiform arrays, sometimes apically secund, 5–25(–50) × 2–14 cm;

branches ascending to arching.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(narrowly obconic) 2 mm (5–7 broad ribs lighter than body), sparsely to moderately strigose;

pappi 2–3 mm.

= 18.

= 18.