Coefficient of Conservatism:
Coefficient of Wetness:
Included in S. graminea in Michigan Flora.
Sandy, peaty, or muddy shores, marshes, and swales, including the shores of the Great Lakes; often in shallow water.
Though with a rather narrow distribution centered on the Great Lakes region, this is a relatively frequent species in Michigan and occurs throughout the state. Like Sagittaria graminea, it produces rosettes of stiff underwater phyllodial leaves derived from bladeless petioles, suggestive of knife blades in shape (not the elongate, thin, limp ribbon-like ones of S. cuneata). Unlike S. graminea, this is not confined to "soft water" lakes, but also occurs in richer sites.