Flora of North America species comparison

usually 1–3, ascending to erect, scabrous to loosely puberulent.

1–20+, erect (stout), conspicuously spreading-hirsute, at least distally.

basal and proximal usually withering by flowering, tapering to long-winged petioles, blades oblanceolate, 30–100 × 7–20(–30) mm, margins serrate or crenate, mid usually largest, apices acute to obtuse, acuminate, faces scabrous;

mid and distal cauline subsessile (1 mm) or sessile, blades (sometimes ± shiny) elliptic to oblanceolate, 10–50 × 5–15(–25) mm, greatly reduced distally, grading into bracts, firm, bases convex-cuneate to rounded, margins finely serrate, often 3-nerved, nerves usually distinct abaxially, faces distinctly scabrous.

basal and proximal cauline usually withering by flowering except on new shoots, tapering to broadly winged petioles, blades oblanceolate, 30–50 × 8–15 mm, rapidly increasing in size distally, margins shallowly serrate, scabroso-strigose, faces often more densely hairy than distal;

mid to distal cauline numerous, crowded, sessile, blades lanceolate-ovate to elliptic-oblong, larger ones 35–120 × 8–35 mm, much reduced distally, bases broad and ± clasping, margins obscurely serrulate or entire, faces usually moderately hirsuto-villous on midnerves, often less so abaxially, adaxial sparsely strigose or glabrous.

0.5–2 mm;

bracteoles 1–5, linear-lanceolate to ovate, minute, grading into phyllaries distally.

2–8 mm, sparsely to moderately strigillose;

bracteoles 1–3, linear to linear-lanceolate, tending to group proximal to involucres, sometimes grading into phyllaries.

narrowly campanulate, 3–5 mm.

narrowly campanulate, 3.5–5.5 mm.

4–7;

laminae 2–3.5 × 0.2–0.7 mm.

(2–)4–10;

laminae 1.2–2.5 × 0.2–0.5 mm.

4–6;

corollas 3 mm, lobes 1 mm.

(2–)4–7;

corollas 4–5 mm, lobes 0.5–1 mm.

in 3–4 series, unequal, oblong, midnerves swollen distally, obtuse or acute to slightly acuminate.

in 4–5 series, unequal, glabrous;

outer narrowly ovate-lanceolate, mid and inner linear-lanceolate.

20–260, in paniculiform arrays, narrowly to broadly secund, pyramidal, branches recurved, secund.

35–500, in paniculiform arrays, usually dense, branches recurved-secund.

1.5–2.5 mm, sparsely to moderately short-strigose;

pappi 3 mm.

(narrowly obconic) 1.5–1.8 mm, sparsely strigillose, sometimes only apically;

pappi 3–4 mm.

= 18, 36.

= 18.