Flora of North America species comparison

mostly cauline; opposite;

petioles 0–1 mm, ciliate or not;

blades lance-linear to linear or filiform, 20–45(–60) × 1–2(–3+) mm, rarely with 1–2 lateral lobes.

basal and cauline, usually alternate, sometimes both alternate and opposite, or all opposite;

blades mostly simple, sometimes with 1–2 lateral lobes (none in C. nudata).

2–4(–6+) cm.

8(–13), neuter;

laminae yellow or purple to pink or white, ± cuneate, broadest distal to middles, usually 3-lobed (middle lobes sometimes toothed).

pinkish to white, 9–15+ mm.

40–60+;

corollas ochroleucous to yellow, 2.5–3 mm.

40–120+;

corollas ochroleucous to yellow or red-brown to purple or apices red-brown to purple, lobes 4;

style-branch apices ± truncate.

deltate-ovate, 4.5–5.5 mm.

(7–)8(–9).

of oblong to linear bractlets 1.5–2+ mm.

of 5–8(–12+) bractlets.

narrowly oblong, 1.3–1.8 mm, not winged;

pappi 0.

obovate or oblong to linear, margins winged or not, wings ± corky to chartaceous, ± pectinate, ± spreading, not ciliolate, faces glabrous, smooth or ± tuberculate;

pappi 0, or (1–)2 cusps, awns, or scales (0.1–1+ mm).

(± mid stem) 1–4(–5+) cm.

± linear (not distally dilated or attenuate).

= 13.

= 26.