Sagittaria cristata, the crested arrowhead, is a perennial herb growing up to tall. The leaves are flat, long and narrow, not lobed, and up to long. The flowers are white.
The species is native to Ontario and north-central United States (Illinois, Iowa, Minnesota, Missouri, Nebraska, Wisconsin, Michigan). It grows in shallow water along the edges of lakes, streams and marshes.Biota of North America Program, 2014 county distribution map Sagittaria cristata Image
References
External links photo of herbarium specimen at Missouri Botanical Garden, lectotype of Sagittaria cristata Michigan Flora, University of Michigan Herbarium, Sagittaria cristata Wetland Plants of Wisconsin, Cofrin Center for Biodiversity, Sagittaria cristata Engelm. Gardening Europe, Piantaggine d acqua, Sagittaria cristata Engelm.