Large clump extending along 6m of upper shoreline. Sandy, gravely substrate, about 60% sun. Under shade of Acer rubrum and large Pinus strobus. Also with Calamagrostis canadensis, Lycopus uniflorus, Carex projecta, Impatiens capensis, and stunted
Flowers bright yellow. Frequent along much of shoreline of this lake, including a large colony on the island which may represent the original introduction. Population discovered by Sam Quagon & Steve Garske during invasive survey in 2003.