Sagittaria brevirostra

Sagittaria brevirostra, common name Midwestern arrowhead or shortbeak arrowhead, is an aquatic plant species native to North America. It is common in wet places in an area stretching from Michigan and Ohio south to Alabama and west to North Dakota, Colorado and northern New Mexico, plus isolated populations in Maryland, New Brunswick, Virginia, Saskatchewan and California (Marin County).
"Sagittaria brevirostra" grows in shallow water along the edges of ponds, swamps and waterways. It is a perennial herb up to 70 cm tall, with arrow-shaped leaves and white flowers.