Flora of North America species comparison

1–3+, erect (straight to ± flexuous), glabrate to sparsely hirsute or strigillose, especially distally.

usually simple, sometimes ± branched.

thin, margins coarsely, sharply serrate to crenate-serrate or serrulate, ciliate to scabrous, apices acute or acuminate, mucronulate, abaxial faces glabrate to sparsely hirsute, midveins usually densely hirsute, sometimes glabrous, adaxial glabrous or glabrate to scabrellous;

basal usually withering by flowering (sometimes persistent on small plants), long-petiolate (petioles slightly winged, sheathing, ciliate), blades ovate, (24–)40–120(–270) × 15–70 mm, bases usually shallowly cordate, sometimes rounded;

proximal cauline often withering by flowering, winged-petiolate, blades ovate to oblanceolate or lanceolate, (24–)60–150 × (10–)20–60 mm, reduced distally, bases subcordate to cuneate;

distal sessile or sometimes subsessile (petioles widely-winged), blades lance-ovate to linear-lanceolate or linear, 18–75 × (2–)5–25 mm, bases cuneate, sometimes ± clasping, margins serrulate or entire.

0.2–1.5+ cm, unequal, reduced distally, ± hirsutulous, bracts 0–4, subulate or linear.

campanulate, (4–)5–6.5 mm.

(12–)14–20;

corollas pale to deep blue or bluish purple, laminae (8.3–)10–15 × 1–2.3 mm.

fewer than disc florets, in 1 series (corollas conspicuous).

14–25(–29);

corollas yellow becoming reddish purple, 4.3–6.4 mm, tubes shorter than funnelform throats, lobes narrowly triangular, 0.5–1.1 mm.

± ampliate, lobes usually erect, sometimes spreading or reflexed.

in 4–5 series, narrowly oblong-lanceolate to oblong-oblanceolate or linear-oblanceolate (innermost), ± unequal, bases indurate 1/3–2/3, margins narrowly scarious, erose, hyaline or infrequently purplish, sparsely ciliolate, green zones lanceolate to linear-lanceolate or linear, apices acuminate to long-acuminate, faces glabrous.

[(6–)13–50(–100+)] in open, paniculiform arrays, branches ascending.

radiate.

yellowish white, obovoid, compressed, 1–2 mm, 5–6-nerved, faces glabrate to sparsely strigillose;

pappi white to pinkish, 3–6 mm.

shorter than to equaling disc florets at flowering.

= 8.

= 48.