Flora of North America species comparison

1–10, ascending to erect, uniformly finely strigillose-villous distal to mid.

usually 1, erect, strigose in arrays.

basal cauline nearly always withering well before flowering, linear-oblanceolate, smaller than proximal mid cauline, serrate;

proximal persisting, sometimes brown-black after senescence, often twisted;

proximal to distal numerous (100+ on tall stems), crowded, sessile, blades (bright green) linear to linear-lanceolate, 20–70 × 2–7(–10) mm, margins remotely serrulate (proximal) to entire or with 1–2 minute serrations (distal), obscurely 3-nerved, one or both faces glabrous or finely strigillose.

basal and proximal cauline narrowing abruptly to elongated petioles, blades spatulate to lanceolate or ovate, 60–120(–150) × 14–45(–65) mm, gradually reduced distally, margins serrate (teeth 4–17), abaxial faces glabrous, glabrous or hairy along nerves, adaxial glabrous or sparsely strigose;

mid to distal cauline petiolate to sessile, abruptly to gradually tapering to short broadly winged petiole-like bases, blades lanceolate, 22–46(–57) × 8–20(–29) mm, bases rounded, margins entire to slightly serrate, apices acute to acuminate, faces glabrous or sparsely hairy.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

5–25 mm, densely short hispido-strigose;

bracteoles 0–3, linear.

narrowly campanulate, 2.5–3.5 mm.

campanulate, (8.6–)9.5–11.5(–12.5) mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

7–13;

laminae (4–)4.5–6.5 × 1–2 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

14–29;

corollas (4.4–)5–6 mm;

lobes 1–2 mm.

in 3–4 series, strongly unequal;

outer ovate, acute, inner oblong, obtuse to rounded.

in 2–3 series, sometimes weakly unequal, glabrate, margins ciliate;

outermost ovate, 3–5(–7) mm, acuminate, innermost lanceolate, 1-nerved, tapering to rounded tip.

100–300+, in short to elongate, pyramidal paniculiform arrays, branches recurved, secund.

2–110+ (1–10 per branch) in leafy, racemiform or short, axillary and terminal racemiform-paniculiform clusters, lateral branches erect, 4–43 cm.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

(± linear-obconic) 1.4–4.4 mm, glabrous;

pappi (3.7–)5–6.5(–7.3) mm.

= 18.

= 18.