Flora of North America species comparison

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

1–20+, erect, slender, glabrous proximally, hispid distally.

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 cauline persistent, subpetiolate to sessile, blades sometimes 3-nerved, linear to linear-lanceolate, 60–100 × 7–10 mm, stiff, flat, margins entire or subentire, faces glabrous or sparsely hairy;

mid to distal cauline sessile, blades linear oblanceolate to linear, 20–40 × 3–5 mm, reduced distally, margins entire.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

29–36.5 mm, strigillose;

bracteoles linear.

narrowly campanulate, 2.5–3.5 mm.

5–6 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

10–20, usually white, rarely pale yellow (conspicuous);

laminae 7–7.3 × 1.4–1.6 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

30–36;

corollas 3.8–4.1 mm, lobes 0.5–0.7 mm.

in 3–4 series, strongly unequal;

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

in 4–5 series, usually prominently 1-nerved, linear, strongly unequal, outer acute, inner acute to obtuse, glabrous.

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

1–25(–50), in corymbiform arrays.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

(obconic) 1–1.5 mm (ribbed), glabrous;

pappi 3.4–4 mm (apically clavate).

= 18.

= 18.