Flora of North America species comparison

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

1 (at ends of rhizomes), ascending to erect, grayish green, moderately to densely finely strigilloso-puberulent.

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 and proximal often withering by flowering, gradually tapering to winged petioles 1/2 length of leaf, blades 45–100 × 10–35 mm, proximalmost much smaller, margins serrate, faces moderately finely scabroso-strigillose;

mid and distal cauline sessile, blades elliptic to lanceolate or ovate, 10–60 × 4–20 mm, sometimes much reduced distally, firm, thickish, margins serrate to entire, strongly 3-nerved or sometimes brochidodromous, faces moderately finely strigillose.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

0.5–3 mm, moderately to densely finely hispiduloso-strigillose;

bracteoles 0–3, lanceolate, strigillose, grading into phyllaries.

narrowly campanulate, 2.5–3.5 mm.

campanulate, 3–6 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

6–10;

laminae 1–2 × 0.2–0.6 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

3–8;

corollas 2.4–3.8 mm, lobes 0.7–1.2 mm.

in 3–4 series, strongly unequal;

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

in 3–4 series, lanceolate to oblong (to 1.5 mm wide), strongly unequal, margins ciliate, apices acute to obtuse, glabrous.

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

(5–)50–300, in compact thyrsiform to secund-pyramidal paniculiform arrays, proximal branches ascending, sometimes apically recurved or branches spreading, recurved, secund.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

(cylindro-obconic) 1.5–2 mm, sparsely strigillose;

pappi ca. 2–3 mm.

= 18.

= 18, 36, 54.