Flora of North America species comparison

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

1–5+, ascending to erect, slender, glabrous;

distal axils bearing short lateral branches with several spreading leaves.

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 blades mostly linear-oblanceolate, 40–160 × 10–20 mm, smallest (10 mm) nearly spatulate, margins shallowly serrate or subentire, sometimes ciliate, ± strongly 3-nerved, apices obtuse to mostly acute, faces glabrous;

mid and distal cauline spreading to reflexed, blades linear, 15–60 × 1–4 mm, reduced to linear bracts in arrays, glabrous.

0.5–2 mm;

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

1–5 mm, bracts 0–5, linear-lanceolate, 1–3 mm, distal grading into phyllaries.

narrowly campanulate, 3–5 mm.

narrowly campanulate, 3–4 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

3–7;

laminae 2–3 × ca. 0.5 mm.

4–6;

corollas 3 mm, lobes 1 mm.

5–9;

corollas 3–3.5 mm, lobes 0.5–0.8 mm.

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

in 2–3 series, strongly unequal, oblong-lanceolate, obtuse to rounded, glabrous.

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

50–350, secund, in paniculiform arrays, openly secund-pyramidal with proximal branches spreading recurved, or as broad as long with proximal branches widely ascending, recurved (elm-tree shaped).

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

pappi 3 mm.

(obconic) 1 mm (with several prominent ridges), glabrous or slightly hairy distally;

pappi 2–3 mm.

= 18, 36.

= 18.