Flora of North America species comparison

1–10+, erect, glabrous.

1–10(–50), ascending to erect, glabrous or sparsely strigillose, copiously viscid-resinous 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 gradually tapering to winged petioles, blades oblanceolate, (25–)100–200 × (4–)15–28 mm, membranous, margins shallowly serrate apically (teeth less than 1 mm), finely ciliate, midnerves prominent, faces glabrous, viscid;

rosettes present at flowering, at ends of elongated rhizomes, 1st leaves the smallest;

proximal to mid cauline similar, sessile, blades linear-elliptic, quickly reduced;

mid blades 40–80 × 6–9 mm, reduced distally, margins entire;

distal sessile, blades linear-elliptic to linear, 10–35 × 1–3 mm, reduced in arrays.

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

sparsely strigillose, copiously resinous, naked proximally to bracteolate near heads;

bracteoles usually 1–3.

narrowly campanulate, 4.5–6 mm.

campanulate, 5–7 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

3–5(–7);

laminae 2.5–3.5 × 1–1.5 mm.

6–10;

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

10–16;

corollas 5–6 mm, lobes 1–1.5(–1.8) mm.

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

in 3–4 series, strongly unequal, apices obtuse, rounded to slightly cuspidate, ciliate, sparsely, finely strigose, obscured by exudate, copiously resinous;

outer ovate (1.5–2 mm), mid narrowly ovate (3–4 × 1.5 mm), inner linear-lanceolate.

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

50–200 (1–15 per branch), in narrowly thyrsiform, paniculiform arrays, 9–30 × 4–5 cm, longer branches ascending, 2–10 cm.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

fusiform to narrowly obconic, 3–5 mm, ribs 5–8, golden brown, darker than intercostal portions, thin, glabrous;

pappi 4–5 mm (sometimes strongly clavate).

= 18.

= 18.