Flora of North America species comparison

1–20+, erect (stout), conspicuously spreading-hirsute, at least distally.

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

basal and proximal cauline usually withering by flowering except on new shoots, tapering to broadly winged petioles, blades oblanceolate, 30–50 × 8–15 mm, rapidly increasing in size distally, margins shallowly serrate, scabroso-strigose, faces often more densely hairy than distal;

mid to distal cauline numerous, crowded, sessile, blades lanceolate-ovate to elliptic-oblong, larger ones 35–120 × 8–35 mm, much reduced distally, bases broad and ± clasping, margins obscurely serrulate or entire, faces usually moderately hirsuto-villous on midnerves, often less so abaxially, adaxial sparsely strigose or glabrous.

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 mm, sparsely to moderately strigillose;

bracteoles 1–3, linear to linear-lanceolate, tending to group proximal to involucres, sometimes grading into phyllaries.

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

bracteoles usually 1–3.

narrowly campanulate, 3.5–5.5 mm.

campanulate, 5–7 mm.

(2–)4–10;

laminae 1.2–2.5 × 0.2–0.5 mm.

3–5(–7);

laminae 2.5–3.5 × 1–1.5 mm.

(2–)4–7;

corollas 4–5 mm, lobes 0.5–1 mm.

10–16;

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

in 4–5 series, unequal, glabrous;

outer narrowly ovate-lanceolate, mid and inner linear-lanceolate.

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.

35–500, in paniculiform arrays, usually dense, 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) 1.5–1.8 mm, sparsely strigillose, sometimes only apically;

pappi 3–4 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.