Isoetes macrospora
Species of spore-bearing plant
Isoetes macrospora, commonly known as big-spore quillwort, is a species of flowering plant in the family Isoetaceae. It can be found in the deep water of low nutrient lakes on the Canadian Shield in Newfoundland, Nova Scotia, Quebec, and Ontario. In the United States, it has been found in Minnesota and south, through the Appalachian Mountains to Virginia.