Rudbeckia laciniata var. ampla (A.Nelson) Cronquist

Leaves: basal 20–50 × 10–25 cm, blades pinnately compound to pinnatifid (basal leaflets or lobes often pinnatifid); proximal and mid cauline blades 5–9-lobed; adaxial faces glabrous or sparsely hairy (hairs arching, 1-seriate). Receptacles ovoid; paleae 4.5–6.5 mm. Ray laminae 25–50 × 7–12 mm. Discs (17–)20–30 × 12–20 mm. Cypselae 4–5.5 mm; pappi mostly longer than 0.7 mm. 2n = 38.