Flora of North America species comparison

petioles 5–40 mm (usually hispido-ciliate);

blades rounded-deltate overall, 15–50+ × 12–40+ mm, 1–2-pinnatisect, ultimate lobes ovate or lanceolate to linear, 3–25+ × (1–)2–3(–15) mm, bases ± cuneate, ultimate margins entire, ciliolate, apices acute to attenuate, faces glabrous or hirtellous.

(10–)30–80+ mm.

± cylindric, 2–3(–4+) × 1.5–2+ mm.

0 or 2–3;

laminae yellowish or whitish, 1–3 mm.

5–13;

corollas yellowish to whitish, 1.5–2 mm.

4–5(–7), oblong to lanceolate, (2–)3–4+ mm.

of 3–4(–6) ± appressed, subulate to filiform bractlets 1–3 mm, margins ciliolate, abaxial faces usually glabrous.

usually borne singly, sometimes in open, ± corymbiform arrays.

outer red-brown, flat or unequally 4-angled, linear, 6–8 mm, margins not ciliate, apices somewhat attenuate, faces obscurely 2-grooved, antrorsely hispidulous toward tips;

inner similar, blackish (sometimes with pale tips), ± equally 4-angled, linear-fusiform, 9–14 mm, margins not ciliate, apices attenuate, faces 2-grooved, antrorsely hispidulous (at least distally);

pappi of 2(–3), erect, retrorsely barbed awns 1–3 mm.