Flora of North America species comparison

1 (at ends of rhizomes), ascending to erect, glabrate proximally to sparsely to densely strigoso-puberulent distally.

1–10+, erect (usually simple), rough-puberulent or shortly spreading hirsute, or proximally glabrate.

basal and proximal cauline often persisting to flowering, gradually tapering to winged petioles, blades linear oblanceolate to oblanceolate, rarely spatulate, 50–120 × 8–30 mm, proximalmost much smaller, margins entire to sharply serrate, faces glabrate to moderately scabroso-strigose;

mid and distal cauline sessile or subsessille, blades elliptic to oblanceolate or obovate, 10–50 × 3–12 mm, mid tapering to bases, somewhat to strongly 3-nerved, largest, usually much reduced distally, margins entire or sometimes distally serrate, apices acute, faces sparsely to densely strigoso-puberulent, sometimes softly so.

basal petioles 1.5–7 mm, blades spatulate to lanceolate or subrhombic, mostly 50–109 × 15–40 mm, bases tapering, glabrous, margins sharply serrate, ciliate, apices acuminate;

mid and distal sessile, blades lanceolate to subrhombic, much reduced distally, margins serrulate becoming entire distally, glabrous.

1–6 mm, sparsely to densely strigillose;

bracteoles 0–5, sometimes clustered near to and grading into phyllaries, linear-lanceolate.

1–7, short-strigose;

bracts leaflike, 5–15 mm.

campanulate, 3.5–6 mm.

campanulate, 5–6 mm.

6–12;

laminae 2.9–6.3 × 0.3–0.7(–1) mm.

8–10(–15);

laminae 2–3.5 mm.

5–17;

corollas 3.5–6 mm, lobes 0.8–1.7 mm.

20–60;

corollas 3.5–4.5 mm, lobes 1.5–2 mm.

in 3–5 series, lanceolate to oblong, strongly unequal, acute or sometimes obtuse, glabrous or sparsely strigillose.

(in 3–4 series) lanceolate, unequal (midnerves swollen), acute to acuminate (tips dark green).

(2–)30–500, in narrow to broad, thyrsiform to secund-pyramidal paniculiform arrays, branches recurved, secund, congested to lax.

15–50+ in compactly rounded corymbiform arrays, becoming paniculiform in robust plants.

0.7–2.7 mm, sparsely to densely strigillose;

pappi 2.5–4.7 mm.

2–3 mm, sparsely strigose to glabrate;

pappi (of 12–22 bristles) about 3 mm.

= 54.