Flora of North America species comparison

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

1–10+, essentially glabrous.

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 short petioles, blades oblanceolate, 50–70 × 10–20 mm, margins serrate, scabroso-strigose, apices acute to acuminate, faces glabrous;

mid and distal cauline subpetiolate or sessile, blades elliptic-lanceolate, 30–70 × 7–15 mm, gradually reduced distally, tapering to bases, margins serrate, scabroso-strigose;

branch leaves similar, reduced to bracts distally.

0.5–2 mm;

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

2–5 mm, bracteolate, glabrous;

bracteoles grading into phyllaries.

narrowly campanulate, 3–5 mm.

narrowly campanulate, 3–5 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

1–4;

laminae 1–2 × 0.5–0.8 mm.

4–6;

corollas 3 mm, lobes 1 mm.

4–6;

corollas 2.5 mm, lobes 1 mm.

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

in 3–4 series, linear-lanceolate, strongly unequal, acute to ± attenuate, glabrous.

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

160–480 in paniculiform arrays, with a strongly secund, primary, arching axis and nearly always 4–5(–8) leafy, elongate, arching, secund, proximal branches.

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

pappi 3 mm.

1.5–2 mm (6–9 ribs), sparsely strigose, more so apically;

pappi 1.5–2 mm.

= 18, 36.

= 18.