Flora of North America species comparison

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

1(–5), erect, usually branching only in array, moderately to densely hispido-villous.

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 winged petioles, blades oblanceolate to ovate, 35–210 × 15–50 mm, margins serrate or crenate, apices acute, sparsely to moderately soft hispido-villous, more densely so on abaxial nerves;

rosettes on rhizome branches sometimes present at flowering;

mid and distal cauline sessile, blades elliptic, 15–50 × 5–15 mm, distally reduced, margins entire.

0.5–2 mm;

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

1.5–2.5 mm, hispido-villous to canescent.

narrowly campanulate, 3–5 mm.

campanulate, 3–5 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

7–9 (white);

laminae 3.5–4 × 1–1.5 mm.

4–6;

corollas 3 mm, lobes 1 mm.

9–12;

corollas 3–4 mm, lobes 0.6–1.2 mm.

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

in 3–4 series, appressed, strongly unequal, oblong, margins white, scarious, apices obtuse to rounded.

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

12–270 (1–15 per branch) in usually wand-shaped paniculiform arrays, of short axillary and terminal racemiform, non-secund clusters, sometimes proximal branches elongated, ascending and bearing short axillary and terminal racemiform clusters.

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

pappi 3 mm.

(narrowly obconic) 1.5–2.5 mm, smooth or with 5–8 narrow, darker, sunken striations, glabrous or sparsely strigose;

pappi 2.5–3.5 mm (sometimes strongly clavate).

= 18, 36.

=18.