Flora of North America species comparison

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

1–50+, erect, glabrous or sometimes sparsely strigose in arrays;

fascicles of small lateral branch leaves often present in axils.

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.

proximal cauline tapering to long, winged petioles, blades oblanceolate to linear-oblanceolate, 50–100(–200) (including petiole) × (5–)10–20(–30) mm, margins entire to serrulate, usually 3-nerved (2 larger lateral nerves), apices acute, mucronate to acuminate and somewhat spinulose, glabrous;

mid to distal cauline sessile, blades lanceolate to linear, 40–60 × (2–)4–14 mm, rapidly reduced distally, margins entire, ciliate, faces glabrous.

0.5–2 mm;

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

1.4–5 mm, glabrous or sparsely strigose;

bracteoles 0–3+, linear to lanceolate.

narrowly campanulate, 3–5 mm.

narrowly to broadly campanulate, 2.5–4.5 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

5–14;

laminae 1.5–2(–4) × 0.2–0.5(–0.75) mm.

4–6;

corollas 3 mm, lobes 1 mm.

(6–)8–20;

corollas (2–)3–4 mm, lobes 0.4–1 mm.

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

in 3–4 series, strongly unequal, margins ciliate-fimbriate, especially apically;

outer ovate to lanceolate, acute to rounded, inner linear-ovate to oblong or linear-lanceolate, obtuse to rounded.

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

10–210 in paniculiform arrays, broadly secund-pyramidal or more rhombic to transversely rhombic, (1.5–)3–12(–20) × (1.5–)3–12 cm;

branches glabrous with secund heads spreading and arching, sometimes ascending with non-secund heads.

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

pappi 3 mm.

(obconic) 1–2 mm, glabrous or sparsely strigose;

pappi 2.5–3 mm.

= 18, 36.

= 18, 36.