Habitat:
Rooted in leafy organic substrate in about 3 cm of standing water, after recent heavy rain. Moderate shade of surrounding mature northern hardwood forest. Puccinellia patches dotted with Lycopus uniflorus and Sium suave, and ringed with
Occurrence Remarks:
Forming two emerald-green patches covering about 50 m sq. in middle of small imbedded wetland.