Flora of North America species comparison

bases soft to hard, herbaceous, often hollow.

bases hard, sometimes ± woody.

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.

blades of mid cauline oblong to lanceolate, (3–)6–40 × 2–15 cm, bases auriculate, auricles straight or curved, rounded, margins usually pinnately lobed, lobes ± deltate, not constricted at bases, terminals usually larger than laterals, dentate or entire.

usually glabrous, sometimes stipitate-glandular.

sessile- or stipitate-glandular.

9–13+ mm.

10–17+ mm.

ligules ± equaling tubes.

ligules ± equaling tubes.

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

sessile- or stipitate-glandular.

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.

dark brown, oblanceoloid to ellipsoid, 2.5–3.5 mm, ribs 4–5(+) on each face, faces transversely rugulose to tuberculate across and between ribs;

pappi 8–14 mm.

= 32, 36.

= 36, 54.