Flora of North America species comparison

1–10+, erect, glabrous.

1–5+, erect to arching, puberulent in arrays and in lines proximal to leaf bases or uniformly.

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.

usually anise-scented when crushed;

basal and proximal usually withering by flowering, tapering to broadly winged petioles, blades oblanceolate, margins entire, short-strigillose, faces glabrous or short scabroso-strigillose along main nerves;

mid and distal cauline sessile, blades lanceolate to linear-lanceolate or narrowly ovate, 30–110 × 8–20 mm, much reduced distally, bases rounded, margins entire, midnerves prominent, sometimes scabroso-strigillose basally to much of length, apices acute, faces glabrous, finely translucent gland-dotted.

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

thin, 2–8 mm, glabrate to finely puberulent, glabrous strips proximal to few linear-lanceolate bracteoles.

narrowly campanulate, 4.5–6 mm.

narrowly campanulate, 3.5–5 mm.

7–9;

laminae 4.5–5.5 × 0.4–0.5 mm.

3–4(–6);

laminae 1.4–2.5 × 0.4–0.9 mm.

6–10;

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

3–5;

corollas 2.7–3.5 mm, lobes 0.5–1.3 mm.

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

in 3–4 series, strongly unequal, yellowish, acute, glabrous;

outer narrowly ovate to lanceolate, inner lanceolate to linear-lanceolate.

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

(20–)75–350, in paniculiform arrays, openly secund, pyramidal, proximal to mid branches ascending to spreading, recurved, secund, 3–18 cm.

1.5–2.2 mm, glabrous;

pappi 3.5–4 mm (apically clavate).

(obconic) 1.4–2.3 mm, strigose to glabrate;

pappi 2.4–3 mm.

= 18.