Flora of North America species comparison

(sometimes purple-tinged) 1–2+, ± decumbent to ascending or erect, branched.

1–3+ (ridged), erect, branched (usually glabrous proximally, puberulent distally).

basal (soon withering) and cauline; petiolate (bases often clasping) or sessile;

blades ± ovate or elliptic to obovate or spatulate, mostly 7–25+ × 3–5(–10+) cm, 2–3-pinnately lobed (primary lobes mostly 6–24+ pairs, narrowly oblong to linear-elliptic or linear, lobules oblong or ovate to ± lanceolate, sometimes curled), ultimate margins entire or ± dentate, faces usually ± villous or arachno-villous to lanate, sometimes glabrescent or glabrate, usually gland-dotted (in pits).

mainly cauline; petiolate;

blades ovate to rounded-deltate, 4–10+ × 1.5–4 cm, usually 1–2-pinnately lobed (primary lobes 3–5+ pairs, ± ovate), ultimate margins pinnatifid to dentate, faces (at least abaxial) usually puberulent, gland-dotted.

8–22+ mm diam.

5–7 mm diam.

flat to hemispheric.

8–21+ (pistillate, fertile; corollas pale yellow to yellow, laminae mostly 1–7+ mm, usually 3-lobed) or 0 (heads quasi-radiant or -radiate or ± disciform, peripheral pistillate florets 15–30+; corollas pale yellow, ± zygomorphic, lobes 3–5, abaxial more pronounced).

10–21+ (more in “doubles”), pistillate, fertile;

corollas white, laminae 2–8(–12) mm.

(2–)3(–4) mm.

ca. 2 mm.

(2–)5–12(–20+) in corymbiform arrays or borne singly.

5–20(–30) in corymbiform arrays.

2–3(–4) mm, weakly 5-ribbed or -angled, gland-dotted;

pappi coroniform, 0.1–0.5+ mm (entire or erose to lacerate).

± columnar, 1–2 mm, 5–10-ribbed;

pappi 0 or coroniform, 0.1–0.2+ mm.

= 54.

= 18.