Flora of North America species comparison

1–2+ (ridged), erect, branched distally (glabrous or sparsely hairy).

1, erect, simple or branched (strigose, glabrate).

basal (soon withering) and cauline; petiolate or sessile;

blades broadly oblong or oval to elliptic, 4–20 × 2–10 cm, pinnately lobed (rachises ± winged, primary lobes 4–10 pairs, lance-linear to lanceolate or narrowly elliptic, often pinnately lobed or toothed), ultimate margins dentate, faces glabrous or sparsely hairy, gland-dotted.

basal and cauline; petiolate (proximal) or sessile (distal);

blades (basal and proximal cauline) mostly elliptic to oblong, 10–20 × 2–8 cm, usually not pinnately lobed (sometimes with 1–4+ lateral lobes near bases), margins ± crenate, faces usually silvery strigose or sericeous (at least when young), glabrescent, ± gland-dotted.

5–10 mm diam.

(3–)5–8(–10) mm diam. (phyllaries 40–60+ in 3–4+ series, tips usually ± dilated).

convex to conic, epaleate.

flat to convex.

0 (heads disciform, peripheral pistillate florets ca. 20; corollas yellow, lobes 3–4).

usually 0 [sometimes 12–15, pistillate, fertile;

corollas white, laminae 4–6+ mm].

2–3 mm.

ca. 2 mm.

20–200 in compact, corymbiform arrays.

(3–)10–60+ in corymbiform arrays.

1–2 mm, 4–5-angled or -ribbed, gland-dotted;

pappi coroniform, 0.2–0.4 mm.

± columnar, 1.5–2 mm, 5–8-ribbed (with non-mucilaginous glands);

pappi coroniform, 0.1–0.4 mm (entire or ± toothed).

= 18.

= 18, 54.