Flora of North America species comparison

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

1–20+ or clustered, erect, glabrous or sparsely strigose in arrays, sometimes glaucous.

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 0;

proximal cauline usually withering by flowering time, sessile, lanceolate, 91–97 × 10–14 mm, margins sharply serrate, 3-nerved, apices acuminate, abaxial faces pilose on nerves or glabrous;

mid to distal cauline similar, 57–76 × 0.7–1.2 cm, largest toward mid stem, decreasing distally.

0.5–2 mm;

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

1.5–3 mm, sparsely to densely strigillose;

bracteoles 0–2, linear-lanceolate.

narrowly campanulate, 3–5 mm.

campanulate, (2–)2.5–4(–5) mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

(7–)9–15(–24) (conspicuous);

laminae 1–3 × (0.1–)0.2–0.4 mm.

4–6;

corollas 3 mm, lobes 1 mm.

(4–)7–12(–17);

corollas (2.5–)3–3.5(–4.5) mm, lobes 0.6–1(–1.4) mm.

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

in 3–4 series, unequal, acute;

outer lanceolate, inner linear-lanceolate (hexaploids from far west can have minute stipitate glands, especially near base of outer phyllaries and peduncle bracts).

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

40–600, secund, in broadly secund, pyramidal paniculiform arrays, rarely rhombic or club-shaped, proximal branches divergent, recurved, glabrous-glabrate or strigose, sometimes glaucous.

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

pappi 3 mm.

1.3–1.5 mm, sparsely strigose;

pappi 2–2.5 mm.

= 18, 36.

=18, 36, 54.