Flora of North America species comparison

usually 1, sometimes 2–6+, erect to ascending, slender, usually much branched from base, divaricately so, densely hispiduloso-glandular, viscid.

1–10+, suberect to reclining or sprawling, slender, repeatedly branched throughout, divaricately so, glabrous, glaucous.

basal and cauline;

proximal petiolate, distal sessile, often clasping;

blades oblanceolate to oblong, reduced distally, 10–50(–70) × 1–25 mm, herbaceous, margins coarsely dentate or pinnatifid, apices of teeth or lobes spiny-tipped, faces glandular-hispidulous.

cauline;

sessile;

proximal blades linear, 10–20 × 2–3 mm, distal greatly reduced, scalelike, (succulent) bases tapered, margins entire, apices apiculate to spinose, faces glabrous.

hemispheric, 4–5 × 6–8 mm (fresh).

5–7 × 4–7 mm in flower.

20–35+;

laminae lavender to whitish, 5–7 mm, coiling after flowering.

0.

25–40+;

corollas yellow, 3–6 mm.

12–25+;

corollas yellow, 5–6 mm.

in 2–3 series, appressed to reflexed distally, lanceolate, 1–5 mm, bases whitish, margins ± entire, apices green or sometimes purplish, acute, faces hispiduloso-glandular.

in 4–5 series, appressed or spreading, lanceolate, 2–8 mm, bases whitish to tan or tan throughout, margins entire to laciniate, apices often green, obtuse to acuminate, faces glabrous.

borne singly (terminal),often in loose, leafy, corymbiform arrays.

borne singly (terminal), in diffuse, bracteate, cymiform arrays.

oblanceolate, 1.4–2 mm, smooth, faces sparsely sericeous;

pappi: ray 0;

disc white, terete, 1.5–3 mm.

subcylindric, 2.5–3 mm, 7–9-nerved per face, faces sparsely sericeous;

pappi whitish, setose, 4–6 mm.

= 10.

= 10.