Flora of North America species comparison

1, erect, seldom branched proximally, stout, proximally glabrate to villous and sparsely glandular (sometimes to base), distally glabrate, strongly glandular.

cauline, thick, ample, bases clasping, margins ± revolute, sharply serrate (rarely subentire) with ± mucronate teeth, veins prominent, apices acute to acuminate, mucronate, faces scabrous, adaxial veins villous;

proximal cauline deciduous by flowering, winged-subpetiolate to sessile, blades oblanceolate to ovate or obovate, smaller than mid, bases tapering;

mid usually sessile, sometimes subsessile, obovate or elliptic, (40–)58–140(–180) × (8–)20–50(–80) mm, bases cuneate to mostly rounded-subauriculate;

distal (in arrays) sessile, ovate to oblanceolate, lanceolate, or elliptic, (8–)10–60(–90) × 2–28(–40) mm, strongly reduced distally.

sometimes sparsely hairy, stipitate-glandular;

bracts usually 0, sometimes 1–3.

campanulate, 9–12 mm, shorter than pappi.

12–35;

corollas blue or violet, (8–)10–15 × 1.2–2 mm.

48–55;

corollas yellow, 9–10 mm, slightly ampliate, tubes narrowly cylindric, slightly longer than narrowly funnelform throats, lobes erect, lanceolate, 0.7–1.3 mm.

34–55 in 4–5 series, midnerves translucent, strongly unequal, membranous, bases indurate, dark green distally, margins densely ciliate, apices spreading or ± squarrose, purple (mucro), acute or acuminate (sometimes mucronate), faces glabrous, densely stipitate-glandular;

outer ovate or lanceolate;

inner oblong-lanceolate, margins hyaline, often purplish distally, scarious.

5–50 in open corymbiform arrays.

tan, fusiform, ± compressed, 3–4 mm, ribs 8–10, appressed-setose;

pappi of cinnamon to pinkish bristles 9–10 mm, about as long as disc corollas.

= ca. 108, ca. 122.