Flora of North America species comparison

bases soft to hard, herbaceous, often hollow.

bases soft to hard, herbaceous, often hollow.

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, 3–20 × 2–6 cm, bases auriculate, auricles ovate to lanceolate or linear, ± straight, obtuse to acute, margins usually pinnately lobed, lobes ± rhombic to lanceolate (constricted at bases) or ± linear, terminals ± equaling laterals, entire or dentate.

usually glabrous, sometimes stipitate-glandular.

usually setose- to stipitate-glandular, often tomentose as well, sometimes glabrous.

9–13+ mm.

10–12+ mm.

ligules ± equaling tubes.

ligules longer than tubes.

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

usually setose- to stipitate-glandular, sometimes tomentose as well.

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.

reddish brown, oblanceoloid, 2.5–3.5 mm, ribs 1–3 on each face, faces transversely rugulose or tuberculate across and between ribs;

pappi 5–8 mm.

, biennials, or perennials, 10–80 cm.

= 32, 36.

= 14.