Northeastern cutleaf coneflower

Leaves: basal 15–40 × 10–25 cm, blades pinnately compound to 2-pinnatifid; proximal cauline 2-pinnatifid, mid cauline blades 5–11-lobed (distal usually 3-lobed); adaxial faces sparsely to moderately hairy. Receptacles globose to ovoid; paleae 3.1–4.1. Ray laminae 20–45 × 7–12 mm. Discs 15–19 × 10–20 mm. Cypselae 3.5–4 mm; pappi mostly 0.7+ mm. 2n = 72, ca. 72, 102+.

Flowering late summer–fall. Wet habitats, along streams and edges of woods; 10–300 m; Conn., Del., Md., Mass., N.H., N.Y., Pa.