Flora of North America species comparison

1–10, ascending to erect, uniformly finely strigillose-villous distal to mid.

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

basal cauline nearly always withering well before flowering, linear-oblanceolate, smaller than proximal mid cauline, serrate;

proximal persisting, sometimes brown-black after senescence, often twisted;

proximal to distal numerous (100+ on tall stems), crowded, sessile, blades (bright green) linear to linear-lanceolate, 20–70 × 2–7(–10) mm, margins remotely serrulate (proximal) to entire or with 1–2 minute serrations (distal), obscurely 3-nerved, one or both faces glabrous or finely strigillose.

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.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

1.5–6 mm, glabrous or sparsely strigillose;

bracteoles 0–2, linear.

narrowly campanulate, 2.5–3.5 mm.

narrowly campanulate, 3–4 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

7–12;

laminae 2–2.5 × 0.2–0.5 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

8–15;

corollas 2.5–3 mm, lobes 0.5–0.8 mm.

in 3–4 series, strongly unequal;

outer ovate, acute, inner oblong, obtuse to rounded.

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

100–300+, in short to elongate, pyramidal paniculiform arrays, branches recurved, secund.

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 mm, strigillose;

pappi 2–3 mm.

0.9–1.5 mm, sparsely strigose;

pappi 2.5–3.5 mm.

= 18.

= 18.