A perennial herbaceous plant that grows up to 1.2 m tall and is found in wet places, streambanks, and swamps. The leaves are up to 20 cm long and 5 cm broad, lanceolate to oval, with a toothed margin. The flowers are usually vibrant red, deeply five-lobed, up to 4 cm across; they are produced in an erect raceme up to 70 cm tall.
Prefers rich, moist soils in partial shade. Blooms summer to fall.