Flora of North America species comparison

1–10, ascending to erect, uniformly finely strigillose-villous distal to mid.

1–10(–50), ascending to erect, glabrous or sparsely strigillose, copiously viscid-resinous in arrays.

basal cauline nearly always withering well before flowering, linear-oblanceolate, smaller than proximal mid cauline, serrate;

proximal persisting, sometimes brown-black after senescence, often twisted;

proximal to distal numerous (100+ on tall stems), crowded, sessile, blades (bright green) linear to linear-lanceolate, 20–70 × 2–7(–10) mm, margins remotely serrulate (proximal) to entire or with 1–2 minute serrations (distal), obscurely 3-nerved, one or both faces glabrous or finely strigillose.

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.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

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

bracteoles usually 1–3.

narrowly campanulate, 2.5–3.5 mm.

campanulate, 5–7 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

3–5(–7);

laminae 2.5–3.5 × 1–1.5 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

10–16;

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

in 3–4 series, strongly unequal;

outer ovate, acute, inner oblong, obtuse to rounded.

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.

100–300+, in short to elongate, pyramidal paniculiform arrays, branches recurved, secund.

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

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

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.