Flora of North America species comparison

1–10+, ascending to erect, proximally glabrous, strigose in arrays.

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

basal and proximal cauline petiolate, blades narrowly oblanceolate, (20–)50–100(–160) × (2–)5–16(–56) mm, margins serrate to crenate, apices acute to obtuse, glabrous;

mid and distal sessile, similar, blades lanceolate to linear, 12–45 × 2–19 mm, reduced distally, margins entire to sparsely serrate, sometimes resinous.

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.

3.1–10.3 mm, glabrate to sparsely strigillose;

bracteoles few, linear.

0.5–2 mm;

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

campanulate, 3–7 mm.

narrowly campanulate, 3–5 mm.

7–16;

laminae 2–5 × 0.7–0.9 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

6–31;

corollas 4–4.9 mm, lobes 0.6–1.3(–2) mm.

4–6;

corollas 3 mm, lobes 1 mm.

(in 3–4 series) strongly unequal, often resinous;

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

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

3–150, not secund, in narrowly elongate, paniculiform arrays, broadly so in robust plants (12.5–19 × 2.5–3 cm wide), consisting of short axillary and terminal racemiform clusters, proximal branches elongate in larger plants, branches glabrate to strigillose.

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

narrowly obconic, 1.9–3.2 mm, sometimes with dark ridges, strigillose;

pappi 1.9–5.2 mm (bristles sometimes clavate).

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

pappi 3 mm.

= 18, 36.