Flora of North America species comparison

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

usually single, glabrous proximally, hirsuto-puberulent in arrays, sometimes irregularly or decurrently so proximally.

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.

proximalmost withering, smaller;

basal and proximal cauline tapering to winged petioles, blades elliptic to elliptic-obovate or subrhombic, mostly 60–150 × 10–50 mm, margins serrate, usually acuminate, glabrous or scabrellous distally;

mid and distal cauline sessile, blades mostly rhombic-elliptic to narrowly lanceolate, 20–40 × 5–8 mm.

1–4 mm, finely strigilloso-villous;

bracteoles 0–2, linear, grading into phyllaries.

1–4 mm, bracteolate.

narrowly campanulate, 2.5–3.5 mm.

campanulate, 4–6 mm.

2–8;

laminae 1–2 × 0.25–0.5 mm.

6–9;

laminae 2–3 × 1–1.5 mm.

2–4(–6);

corollas 2.3–3.5 mm, lobes 0.4–1 mm.

mostly 8–12;

corollas 4–4.5 mm, lobes 1–1.5 mm.

in 3–4 series, strongly unequal;

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

in 3–4 series, appressed, unequal (outer 1/2 length of inner), linear to lanceolate-deltate (inner series usually striate with 2 prominent secondary nerves), apices narrowly acute or minutely obtuse.

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

50–250, in elongate, narrowly paniculiform arrays, leafy-bracteate proximally, not secund, proximal branches sometimes elongated and ascending.

(narrowly obconic) 1 mm, strigillose;

pappi 2–3 mm.

(tan) 1.75–2.5 mm, usually glabrous, sometimes sparsely strigose;

pappi 1.5–2.5 mm.

= 18.

= 18.