Flora of North America species comparison

1–5+, sparsely to moderately short strigose or villous.

1–10+, erect, glabrous, sometimes sparsely hairy in arrays; usually with fascicles of small leaves in axils of distal leaves.

basal withering by flowering, petiolate, smaller to much smaller than cauline, blades oblanceolate, margins serrate;

cauline sessile, blades elliptic-lanceolate or -oblanceolate, mid 80–140 × 2.5–4 mm, distally reduced, usually membranous, bases tapering, attenuate, margins sharply toothed along much of length to nearly entire, ciliate, abaxial faces short-pilose along small and large nerves, adaxial short-pilose along larger nerves.

basal and proximal cauline tapering gradually to winged petioles, blades oblanceolate to ovate, 100–300 × 20–70 mm, usually multiple lateral nerves pronounced, margins sharply serrate, ciliate, faces glabrous;

mid to distal cauline sessile, blades linear-lanceolate, 30–50 × 8–11 mm, reduced distally, margins entire or finely serrate.

1–6 mm, moderately canescent;

bracteoles linear to lanceolate.

1.5–6 mm, glabrous or sparsely strigillose;

bracteoles 0–2, linear.

campanulate, 4.5–5.5 mm.

narrowly campanulate, 3–4 mm.

6–8;

laminae 3–4 × 1–1.5 mm wide.

7–12;

laminae 2–2.5 × 0.2–0.5 mm.

8–14;

corollas 4–5 mm, lobes ca. 1.5 mm.

8–15;

corollas 2.5–3 mm, lobes 0.5–0.8 mm.

in ca. 3 series, strongly unequal, erect to slightly squarrose-tipped, lanceolate, apices acute, glabrate, sparsely to moderately, finely stipitate-glandular.

in 3–4 series, strongly unequal, outer ovate, acute, inner lanceolate, obtuse.

5–160 (2–10+ more per short branch cluster), in narrowly elongate paniculiform arrays, branches usually 1–6 cm (much longer in damaged plants, sometimes 1–3 proximal branches much elongated in undamaged plants), ascending and bearing short terminal racemiform or paniculiform clusters.

60–450, secund, in paniculiform arrays, openly secund-pyramidal with proximal branches spreading-recurved, or as broad as long with proximal branches widely ascending, recurved (elm-tree shaped).

(reddish brown) 2–3 mm, glabrous;

pappi 4–5 mm.

0.9–1.5 mm, sparsely strigose;

pappi 2.5–3.5 mm.

= 18.