Flora of North America species comparison

1–10+, ascending to erect, proximally glabrous, strigose in arrays.

1–3, terete, shallowly multicostate, glabrous, sparsely to moderately hirtellous distally (arrays).

basal and proximal cauline petiolate, blades narrowly oblanceolate, (20–)50–100(–160) × (2–)5–16(–56) mm, margins serrate to crenate, apices acute to obtuse, glabrous;

mid and distal sessile, similar, blades lanceolate to linear, 12–45 × 2–19 mm, reduced distally, margins entire to sparsely serrate, sometimes resinous.

basal and proximal cauline winged-petiolate;

blades mostly spatulate to oblanceolate, 100–150 × 15–32 mm, tapering, margins distally coarsely but shallowly serrate, apices acute to narrowly rounded, often narrowed to short, often brown callused tips;

mid to distal cauline progressively more narrowly oblanceolate and acute, then to elliptic or lanceolate-elliptic, 35–60 × 6–10 mm, reduced distally, grading into widely ascending to spreading or reflexed bracts;

faces abaxially pale, midnerves raised, deep green, level reticulum of branch nerves, margins entire, ciliate, adaxially deep green with only impressed midnerve evident.

3.1–10.3 mm, glabrate to sparsely strigillose;

bracteoles few, linear.

stiffly, widely ascending, angulate, slightly compressed, stubby-bracteolate;

bracts grading into phyllaries, sparsely hirtellous.

campanulate, 3–7 mm.

turbinate, 8–12 mm.

7–16;

laminae 2–5 × 0.7–0.9 mm.

6–10;

laminae 3–4 mm.

6–31;

corollas 4–4.9 mm, lobes 0.6–1.3(–2) mm.

11–14;

corollas 6 mm, lobes ca. 2 mm.

(in 3–4 series) strongly unequal, often resinous;

outer ovate, acute, inner linear-oblong, obtuse.

(in 3–4 series) 1–1.3 mm wide, unequal, pilose-ciliate;

outer mostly green, oblong, blunt, inner spatulate or linear-oblanceolate.

3–150, not secund, in narrowly elongate, paniculiform arrays, broadly so in robust plants (12.5–19 × 2.5–3 cm wide), consisting of short axillary and terminal racemiform clusters, proximal branches elongate in larger plants, branches glabrate to strigillose.

10–50 (1–5+ per branch), in racemiform or narrowly paniculiform arrays, mostly with primary branches widely to narrowly ascending, proximalmost usually longest.

narrowly obconic, 1.9–3.2 mm, sometimes with dark ridges, strigillose;

pappi 1.9–5.2 mm (bristles sometimes clavate).

cylindric to somewhat compressed-obconic, 1.5–4 mm, typically 5-ribbed, glabrous, abruptly narrowed to short “neck” surmounted by narrow, brownish pappus disc;

pappi (white) 3–4 mm.

= 36.