Flora of North America species comparison

bases soft to hard, herbaceous, often hollow.

erect, branched distally or throughout, usually glabrous, sometimes stipitate-glandular (mostly distally).

blades of mid cauline spatulate or oblong to obovate or lanceolate, 6–35 × 1–15 cm, bases auriculate, auricles deltate to lanceolate, ± straight, acute, margins usually pinnately (often runcinately) lobed, lobes ± deltate to lanceolate, not constricted at bases, terminals usually larger than laterals, entire or dentate.

basal and cauline or mostly cauline;

basal usually petiolate (petioles usually winged), cauline often sessile;

blades mostly oblong, oblanceolate, or lanceolate, (bases often auriculate) margins usually 1(–2)-pinnately lobed, ultimate margins usually dentate (teeth often ± prickly), sometimes entire.

usually glabrous, sometimes stipitate-glandular.

not notably dilated distally, usually ± bracteolate, glabrous or stipitate-glandular and/or tomentose.

9–13+ mm.

campanulate to urceolate, 5–15+ mm diam.

flat to convex, ± pitted, glabrous, epaleate.

[30–]80–250[–450+];

corollas yellow to orange (not deliquescent; anthers yellowish to brownish apically).

ligules ± equaling tubes.

usually glabrous, sometimes tomentose and/or stipitate-glandular.

27–50 in 3–5+ series, unequal, green, deltate to lanceolate or linear, margins sometimes narrowly scarious (sometimes ciliate), apices acute (faces glabrous or stipitate- to setose-glandular).

0.

borne in corymbiform to subumbelliform arrays.

dark brown, mostly oblanceoloid, 2.5–3.5+ mm, ribs 2–4 on each face, faces transversely rugulose or tuberculate across and between ribs;

pappi 5–8 mm.

stramineous or reddish to dark brown, ± compressed, mostly oblong or oblanceoloid to ellipsoid, beaks 0, ribs usually 2–4(–5+) on each face, faces sometimes transversely rugulose or tuberculate, glabrous;

pappi tardily falling or persistent, of 80–100+, white, smooth or barbellulate bristles (some flattened, ± setiform scales), outer usually distinct in ± 1 series, inner basally coherent or connate, in 2–3+ series.

= 9.

= 32, 36.