Habitat:
Clump on exposed mud and in shallow water to about 1 dm deep, at bottom of disturbed riverbank. About 60% sun. Under shade of nearby Acer rubrum, A. saccharum, and Betula papyrifera. With Onoclea sensibilis, Impatiens capensis, Scutellaria galericulata,
Occurrence Remarks:
Flowers bright yellow. Several other shoreline patches visible from here.