Flora of North America species comparison

usually 1–3, ascending to erect, scabrous to loosely puberulent.

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

basal and proximal usually withering by flowering, tapering to long-winged petioles, blades oblanceolate, 30–100 × 7–20(–30) mm, margins serrate or crenate, mid usually largest, apices acute to obtuse, acuminate, faces scabrous;

mid and distal cauline subsessile (1 mm) or sessile, blades (sometimes ± shiny) elliptic to oblanceolate, 10–50 × 5–15(–25) mm, greatly reduced distally, grading into bracts, firm, bases convex-cuneate to rounded, margins finely serrate, often 3-nerved, nerves usually distinct abaxially, faces distinctly scabrous.

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.

0.5–2 mm;

bracteoles 1–5, linear-lanceolate to ovate, minute, grading into phyllaries distally.

29–36.5 mm, strigillose;

bracteoles linear.

narrowly campanulate, 3–5 mm.

5–6 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

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

laminae 7–7.3 × 1.4–1.6 mm.

4–6;

corollas 3 mm, lobes 1 mm.

30–36;

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

in 3–4 series, unequal, oblong, midnerves swollen distally, obtuse or acute to slightly acuminate.

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

20–260, in paniculiform arrays, narrowly to broadly secund, pyramidal, branches recurved, secund.

1–25(–50), in corymbiform arrays.

1.5–2.5 mm, sparsely to moderately short-strigose;

pappi 3 mm.

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

pappi 3.4–4 mm (apically clavate).

= 18, 36.

= 18.