Flora of North America species comparison

1–3+, erect (straight, slender, often reddish to slightly glaucous proximally), glabrous.

1–6, ascending to erect, glabrous or puberulent, especially distally.

stiff, margins entire to sparsely subserrulate, revolute, scabrellous, apices mucronulate, sometimes with callous point, faces glabrous, abaxial midveins sometimes sparsely strigillose;

basal withering by flowering, subpetiolate to petiolate, petioles winged, base dilated, sheathing, eciliate, blades linear-oblanceolate to ovate or suborbiculate, 20–150 × 5–60 mm, bases attenuate, margins shallowly serrate or entire, apices obtuse to rounded;

proximal cauline withering by flowering, sessile or subpetiolate, petioles widely winged, bases strongly clasping, blades linear-lanceolate to linear, 15–90 × 2–12 mm, bases attenuate to cuneate or subauriculate, ± clasping, apices obtuse to acute;

distal sessile, blades linear-lanceolate (sometimes lanceolate) to linear, (40–)60–150 × 2–6(–8) mm, ± reduced distally, bases subauriculate, subclasping, margins entire or sometimes remotely serrulate, apices acute.

thin, margins entire, apices acute, faces glabrous or scabridulous;

basal withering by flowering, petiolate, blades narrowly oblanceolate to linear, 10–60 × 2–10 mm, attenuate, margins entire;

proximalmost cauline sometimes withering by flowering, sessile, blades linear to narrowly oblanceolate, 30–80 × 2–8 mm, bases cuneate, apices acute;

distal sessile, blades linear, 10–50 × 2–8 mm, bases ± cuneate, truncate.

0.5–5 cm, glabrous, bracts 1–3, remote, linear-lanceolate to linear, reduced distally, not grading into phyllaries (sometimes subtending heads).

sparsely to densely hairy, bracts 3–10, linear to narrowly elliptic, much smaller than distal leaves.

cylindro-campanulate, (4–)5–8 mm.

campanulate, 4–7 mm.

(15–)25–35(–41);

corollas white to often pale rose, pale purple or lavender, laminae (7–)10–15(–20) × 1.1–1.5 mm.

14–35;

corollas usually white, sometimes pale violet, laminae 7–12 × 1–2 mm.

(15–)25–30(–40);

corollas cream or pale yellow becoming pink or brown purple, 3.7–6.6 mm, tubes shorter than funnelform throats, lobes triangular, 0.5–1 mm.

20–35;

corollas yellow, 4.5–6.5 mm, lobes triangular, 0.7–1 mm, glabrous.

in 4–5 series, usually appressed, rarely outer recurved, lanceolate or oblong-lanceolate (outer) to linear (innermost) ± unequal to sometimes subequal, bases indurate 1/3–1/2 (sometimes not indurate), margins scarious, erose, hyaline or tinged with reddish purple, sparsely ciliolate, green zones lanceolate to linear-lanceolate, apices acute to acuminate, mucronate to apiculate, often purple or reddish purple (particularly inner), faces glabrous.

in 5–6 series, appressed, narrowly oblanceolate (outer) to linear (inner), unequal, bases (outer) herbaceous or scarious less than 1/2, margins entire, green zones ovate to linear (inner), apices obtuse, faces glabrous.

borne singly or in open, often lax, racemiform or paniculiform arrays, branches ascending, sparsely leafy.

in racemiforn to paniculiform arrays, branches usually less than 10(–20) cm.

yellowish tan or purple to brownish with purple streaks or grayish tan (nerves stramineous), obovoid, ± compressed, 0.6–2 mm, 3–5-nerved, faces sparsely strigillose;

pappi white, 2.7–6.4 mm.

brown, cylindric to obovoid, not compressed, 2–2.5 mm, 2–5-nerved, faces hairy;

pappi white, 5–7 mm.

= 16, 32, 48, 64.

= 16, 32, 48.