Flora of North America species comparison

1–50+, erect, glabrous or densely hispid to strigose.

1–15+, decumbent to erect, proximally glabrous, sparsely strigose in array.

basal withering by flowering;

proximal cauline usually withering by flowering, sessile, blades elliptic to lanceolate, 68–104 × 20–25 mm, margins sharply serrate, apices acute to attenuate, abaxial faces usually hispido-strigose (at least on main nerves), nerves sometimes prominent, abaxial glabrate;

mid to distal cauline sessile, blades lanceolate, elliptic or ovate, (15–)40–75(–90) × (6–)12–22(–32) mm, largest at midstem, somewhat reduced to much reduced distally, margins coarsely to finely serrate, ciliate, indument similar to proximal or denser.

basal petiolate to sessile;

blades spatulate, 40–120 × 10–30 mm, subcoriaceous, margins crenate, apices acute to obtuse, glabrous;

many-leaved rosettes present at flowering;

cauline 9–19, sessile;

blades similar to basal proximally, becoming oblanceolate distally, reduced to 10 mm, margins entire, apices acute, often heavily resinous.

1–1.8 mm, sparsely to densely hispido-strigillose;

bracteoles linear- lanceolate to ovate.

3–10 mm (longest), sparsely strigose;

bracts clustered near base of heads.

narrowly campanulate, (2–)2.5–3.5(–4.5) mm.

campanulate, 4–7 mm.

(4–)6–8(–12);

laminae (0.9–)1–1.6(–2.3) × 0.4–0.7 mm.

4–10;

laminae 2–4 × 1–2 mm.

(2–)4–6(–8);

corollas 2–3.5(–4.5) mm, lobes (0.5–)0.7–1(–1.3) mm.

10–18;

corollas 4.3–6 mm, lobes 0.7–1.5 mm.

in 3–4 series, strongly unequal, lanceolate to linear-lanceolate, acute to obtuse.

(15–24 in 3–4 series) unequal, very resinous;

outer ovate, obtuse, inner linear-lanceolate, obtuse or acute.

50–1500, secund, in secund-pyramidal paniculiform arrays 7–36(–50) × 9–26 cm, compact to lax, branches divergent and recurved, longest 0.8–34 cm, leafy-bracteate.

5–100+, not secund, in paniculiform arrays, or virgate to thyrsiform in robust plants, consisting of axillary and terminal racemiform clusters.

(narrowly obconic) 0.9–1.5 mm, moderately strigillose;

pappi 1.8–2.5 mm.

appressed-strigose;

pappi 3.5–5.5 mm.

= 18.