Flora of North America species comparison

1–20(–50+), stout, finely puberulent or scabrous-puberulent at least distally.

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

basal absent at flowering;

cauline sessile to short-petiolate;

blades usually lanceolate-elliptic or ovate, sometimes linear-lanceolate, 30–150 × 5–30 mm, thick and firm, margins entire or few toothed, somewhat to much reduced distally, abaxial faces sometimes resinous and shiny, glabrous or strigillose (hairs mostly 0.1–1.4 mm), adaxial glabrous or scabrous.

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.

mostly 2–15 mm, bracteolate, sparsely to densely short hispid-strigose.

1.5–6 mm, glabrous or sparsely strigillose;

bracteoles 0–2, linear.

campanulate, 4.5–7.5 mm.

narrowly campanulate, 3–4 mm.

(5–)7–9;

laminae 3–7 × 1–2 mm.

7–12;

laminae 2–2.5 × 0.2–0.5 mm.

(8–)10–16;

corollas 4–5 mm, lobes ca. 1–2 mm.

8–15;

corollas 2.5–3 mm, lobes 0.5–0.8 mm.

in 3–4 series, unequal, linear-lanceolate, acute to attenuate, ± squarrose-tipped, glabrous or moderately strigose, sparsely to moderately stipitate-glandular, sometimes viscid.

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

10–190+ in paniculiform (rarely racemiform) arrays, usually elongate, usually leafy-bracteate, bracts similar to distal leaves but reduced;

branches stiffly ascending, not secund, sometimes elongate.

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).

3–4 mm, glabrous or glabrate;

pappi ca. 4 mm.

0.9–1.5 mm, sparsely strigose;

pappi 2.5–3.5 mm.

= 18, 36, 54.

= 18.