Flora of North America species comparison

erect.

erect.

mostly alternate;

petioles 2–8(–12+) mm;

blades (white) ovate to elliptic, 10–25(–45) × 8–15(–30) mm, (1–)2–3-pinnately lobed, abaxial and adaxial faces densely strigillose.

mostly alternate;

petioles 0;

blades mostly filiform, 5–30(–65+) × 0.5–1.5 mm, sometimes with 3(–5+) filiform lobes, abaxial faces glabrous or glabrate, often vernicose, adaxial faces densely scabrellous (white).

peduncles 0–1(–2) mm;

involucres shallowly cup-shaped, 3–5 mm diam., ± strigillose;

florets 8–15+.

peduncles 0–0.5 mm;

involucres ± cup-shaped, 2–4 mm diam., ± glabrate, ± vernicose;

florets 5–12+.

intermixed with staminates (sometimes wanting or staminates sometimes wanting, plants unisexual);

florets (1–)2.

± intermixed with staminates;

florets 1.

bodies ± globose, 3–5+ mm, pilosulous and/or gland-dotted, spines 12–25+, scattered, ± subulate (± navicular at bases), 2–4 mm, tips straight.

bodies fusiform to pyriform, 4–5 mm, stipitate-glandular, wings 7–12+, mostly around middles, oblanceolate to cuneiform, 2–3 × 1–2 mm.

= 36, 72, 108, 126.

= 36.