A large-flowered marginal aquatic perennial that typically grows 3-6’ tall in shallow water and spreads, sometimes aggressively, by thickened rhizomes rooted in the mud. This plant is often found near ponds, lakes, slow streams, and marshes.  

This plant has flowers that grow up to 10" across, making them one of the largest flowers in North America. The flowers are thermogenic (generating heat) and are pollinated by beetles, primarily Chrysomelidae and medium-sized bees. Phorid flies (Phoridae) also visit the flowers.

For water gardens or small ponds, plant roots in large containers or planting baskets with up to 24” of water covering the crowns. Container grown plants are easier to control and, if desired, to move to other locations. This plant is tolerant of heat. The rubes, leaves, and seeds of this plant are edible.