Flora of North America species comparison

1–10+, erect, glabrous.

usually 1, erect, glabrous, sparsely 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.

basal when present similar to proximal cauline;

proximal cauline often withering by flowering, tapering (sometimes rather abruptly) to short, winged petioles, blades ovate-lanceolate, 60–100(–150) × 30–40(–50) mm, thin, margins coarsely serrate, apices acute, abaxial faces hirsute on main nerves, adaxial sparsely hirsute to somewhat scabrous;

mid to distal cauline subsessile to sessile, blades lanceolate, 20–50 × 5–20 mm, gradually reduced distally, margins entire.

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

1.7–2 mm, sparsely to moderately short hispido-strigose, bracteoles 2–7, ovate, grading into phyllaries.

narrowly campanulate, 4.5–6 mm.

3–4 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

3–6;

laminae 1–2 × 0.5–1 mm.

6–10;

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

4–7;

corollas 2.7–3 mm, lobes 0.5–1.1 mm.

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

(16–18) in 2–3 series, unequal;

outer ovate, acute, inner linear-lanceolate, obtuse to acute.

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

20–150, secund, in open paniculiform arrays, proximal branches elongate and widely divergent, sometimes pyramidal-secund with proximal branches short and recurved-secund.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

1–1.6 mm, finely hairy;

pappi ± 2.5 mm.

= 18.