Flora of North America species comparison

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

usually 1, erect, glabrous, short hispido-strigose in arrays.

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 tapering to long petioles that partially sheath stems;

blades oblanceolate, 100–350 × 5–60 mm, margins subentire to serrate, apices acute;

mid to distal sessile, not sheathing stems, blades lanceolate, 20–50 × 5–10 mm, much reduced distally, margins entire.

0.5–2 mm;

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

1–4 mm, glabrous or sparsely strigose.

narrowly campanulate, 3–5 mm.

3–5 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

1–8 (moderately conspicuous);

laminae 3.2–3.7 × 0.4–0.6 mm.

4–6;

corollas 3 mm, lobes 1 mm.

6–8;

corollas 4.6–5 mm, lobes 0.6–1 mm.

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

(14–18) in 3–5 series, unequal, usually apically ciliate;

outer ovate, acute, inner linear-oblong, obtuse.

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

35–230 in elongate paniculiform arrays, sometimes narrow and secund pyramidal, usually narrowly to broadly, non-secund thyrsiform;

branches strongly ascending with non-secund heads to arching with heads secund.

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

pappi 3 mm.

1–2 mm, glabrous or sparsely strigillose;

pappi 2.7–3 mm (weakly clavate).

= 18, 36.

= 18, 36.