Flora of North America species comparison

1–10+, erect, glabrous.

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

basal and proximal cauline usually withering by flowering (other rosettes may be present), tapering to long, winged petioles, blades often recurved, linear- lanceolate or -oblanceolate, 100–240 × 8–16 mm, folded along midrib (V-shaped in cross section), bases usually with (2–)3–8 prominent lateral nerves, apices acute to obtuse, faces glabrous;

mid to distal cauline sessile, blades recurved, linear-lanceolate, 50–70 × 8–11 mm, reduced distally, folded, bases with prominent lateral nerves.

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.

2.8–4 mm, moderately short-hispido-strigose, lanceolate bracteoles 0–1.

3–10 mm (longest), sparsely strigose;

bracts clustered near base of heads.

narrowly campanulate, 4.5–6 mm.

campanulate, 4–7 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

4–10;

laminae 2–4 × 1–2 mm.

6–10;

corollas 4.5–5.2 mm, lobes 0.7–1.8 mm.

10–18;

corollas 4.3–6 mm, lobes 0.7–1.5 mm.

(14–18) in 3–4 series, unequal, obtuse, broad, striations weak, obtuse to rounded, glabrous.

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

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

30–450 in corymbiform to somewhat paniculiform with rounded corymbiform branches (robust plants) arrays, branches and peduncles strigillose.

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

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

appressed-strigose;

pappi 3.5–5.5 mm.

= 18.

= 18.