Flora of North America species comparison

3–15+, branched in distal 1/2, slender and wiry, glabrous.

basal often withering by flowering, 20–35 × 6–12 mm, pinnatifid;

cauline evenly spaced, blades oblong to linear, scalelike, 4–6 × 1–2 mm (except proximalmost), markedly reduced distally, margins usually entire, faces glabrous.

blades entire, serrate, dentate, or pinnatifid to deeply 2-pinnatifid, teeth or lobes usually bristle-tipped, often markedly so.

minutely glandular, if stipitate, then minutely so;

bracts 5–25, imbricate, grading into phyllaries.

hemispheric (narrowed at bases), 0.5–0.8 × 1–1.2 cm.

broadly turbinate to depressed campanulate or hemispheric.

pit borders laciniate, teeth or setae distinct or basally connate, 0.4–3 mm.

15–25;

corollas yellow, tubes 3.5–4 mm, laminae 5–6 × 1.5–2.5 mm.

yellow.

25–40+;

corollas 4.8–6.3 mm.

in 5–6 series, oblong to linear-oblanceolate, 1.5–6.5 mm, apices acute, tipped by white bristle, faces minutely stipitate-glandular.

in 4–8 series, appressed to squarrose, light green to stramineous, linear to narrowly oblong, 1–2 mm wide, unequal, proximally rigid, distal 1/5–1/2 with green patch or strip (sometimes blackish near apices), not markedly expanded, apices obtuse to acuminate, usually stiffly, often markedly bristle-tipped, faces usually hairy, often stipitate-glandular.

radiate.

narrowly obovoid to oblanceoloid, 1.5–2.5 mm, nerves 12–18, moderately tawny hairy;

pappi tawny, 3.5–6 mm, a few abaxial bristles to 1/3 of longest.

often dimorphic, ellipsoid to broadly obovoid, or obscurely and narrowly cordiform, ray obscurely 3-sided (usually rounded on abaxial edge, often asymmetric, slightly shorter), disc flattened laterally, 1.5–3.2 mm, walls thin, 6–16-ribbed, usually weak, sometimes prominent, faces glabrous to densely silky;

pappi of white to tawny, slightly to moderately dorsiventrally, basally flattened bristles 3.5–6 mm, in 2–4 markedly unequal series, ray sometimes shorter.

= (2, 3,) 4.

= 8, 16.