Flora of North America species comparison

1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so.

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

basal 0;

proximal cauline sessile, blades narrowly to broadly oblanceolate, 35–75(–100) × (6–)7.5–14(–20) mm, proximal much smaller, tapering to bases, margins subentire or finely serrulate to coarsely, sharply serrate (teeth 0–9 per side), ciliate, 3-nerved, sometimes obscurely so, apices acute, abaxial faces glabrate to sparsely short-strigose, adaxial glabrous;

mid to distal cauline sessile, blades oblanceolate, becoming lanceolate distally, 20–60 × 4–8(–11) mm, largest near mid stem, somewhat to much reduced distally, margins entire or finely serrulate, rarely serrate (teeth 1–8 per side), usually becoming entire to sparsely serrulate distally, ciliate, apices acute, faces glabrous or sparsely strigoso-villous, more so along abaxial 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.

2–7 mm, sparsely to moderately short strigoso-villous;

bracteoles 1–3, linear, rarely minutely stipitate-glandular.

1.5–6 mm, glabrous or sparsely strigillose;

bracteoles 0–2, linear.

narrowly campanulate, 2.5–3.5(–4) mm.

narrowly campanulate, 3–4 mm.

(8–)11–15(–17);

laminae 1–2.5 × 0.1–0.4(–0.7) mm.

7–12;

laminae 2–2.5 × 0.2–0.5 mm.

(3–)5–11(–16);

corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm.

8–15;

corollas 2.5–3 mm, lobes 0.5–0.8 mm.

in 3–4 series, strongly unequal, margins sparsely long ciliate, acute, faces glabrous, rarely sparsely minutely stipitate-glandular;

outer lanceolate, inner linear-lanceolate.

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

12–500+, sometimes secund, in short to long, thyrsiform or narrowly secund-pyramidal paniculiform arrays, usually congested, club-shaped to rarely wand-shaped, (2.5–) 10–20 × (2–)4–8(–10) cm, branches usually ascending or sometimes arching spreading.

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).

(narrowly obconic) 1–1.5 mm, sparsely to moderately strigose;

pappi 2.5–3.3 mm.

0.9–1.5 mm, sparsely strigose;

pappi 2.5–3.5 mm.

= 18, 36.

= 18.