Flora of North America species comparison

1–5+, ascending to erect, glabrous or sparsely puberulent.

1–5+, ascending to erect (grayish brown to brown), moderately to densely hairy.

thin, margins entire, apices acute, faces glabrous or sparsely puberulent;

basal persistent, petiolate, blades narrowly elliptic to obovate, 50–150 × 3–15 mm, attenuate, margins entire;

proximal cauline sessile or subpetiolate, blades linear to narrowly elliptic, 50–150 × 2–15 mm, bases attenuate or cuneate;

distal sessile, blades 30–60 × 2–10 mm, reduced distally, bases cuneate to rounded.

(light grayish green) firm, margins entire, strigose, apices ± spine-tipped;

basal withering by flowering, sessile, blades oblanceolate, 10–40 × 3–10 mm, bases attenuate, margins usually entire, rarely remotely serrate, scabrous, apices acute to obtuse, rounded to mucronulate-spinose, faces glabrate to moderately strigose;

proximal cauline sessile, blades linear oblanceolate to oblong, 10–40(–60) × 1.5–4(–7) mm, reduced distally, bases cuneate, margins entire, coarsely ciliate, apices acute or obtuse, faces sparsely to densely appressed hispido-strigose;

distal sessile, blades linear-oblong to linear-lanceolate, 25–45 × 2–3 mm, bases cuneate, margins entire, apices acute, faces moderately to densely strigose.

sparsely hairy, bracts 0–3+.

0.2–4 cm, densely hairy, bracts 1–3+, linear to lanceolate, densely hairy.

campanulate, 5–10 mm.

campanulate, (4.5–)5–8 mm.

15–40;

corollas violet, laminae 9–15 × 1–2 mm.

(15–)20–35;

corollas usually white, sometimes blue or pink, laminae (8–)18–30 × 1.1–1.4 mm.

30-80(–100);

corollas yellow, sometimes becoming reddish, 4.5–6 mm, lobes triangular, 0.5–1 mm.

(8–)18–30;

corollas yellow becoming brown, 2–2.5 mm, lobes triangular, 0.7–1.2 mm, glabrous.

in 3–5 series, narrowly oblong or linear (outer) to linear (inner), unequal, bases indurate, margins entire, green zones elliptic to lanceolate, apices usually acute, sometimes obtuse, faces glabrous or ± puberulent.

in 3–4 series, outer oblanceolate to spatulate (1.5–2 mm), inner linear-lanceolate (3–4 mm), unequal, bases (whitish to tan) ± indurate in basal 1/2–3/4, margins hyaline, scabrous proximally, green zones diamond-shaped, in distal 1/4–1/2, apices (outer) acute to obtuse, clear spine-tipped, spreading to reflexed, (inner) acuminate to attenuate, faces sparsely to moderately hispid-strigose.

in corymbiform to paniculiform arrays, branches usually few.

[(1–)10–200+] in racemiform to diffuse-paniculiform arrays (1–10+ per branch, usually not crowded).

brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, ± 4-nerved, faces hairy;

pappi whitish, 5–7 mm.

dark brown, obovoid, not compressed, 2–2.5 mm, faint-nerved, faces densely strigose;

pappi whitish, 4.5–6 mm.