Sagittaria teres, the quill-leaved arrowheadGo Botany, New England Wildflower society, Sagittaria teres S. Wats., quill-leaved arrowhead photos, description, info on ecology + conservation or slender arrowhead, is an aquatic plant species in the genus Sagittaria. It is a perennial herb up to tall. The leaves can grow both under and above the water. The flowers are white, up to in diameter, borne in one or more whorls on a stalk rising above the leaves.Gray, Asa. 1890. Manual of the Botany of the Northern United States (ed. 6) 555, Sagittaria teres
It is native to the northeastern United States: Rhode Island (Providence and Washington Counties), Massachusetts, New Hampshire (Hillsborough County), New York (Suffolk County) and New Jersey.Biota of North America Program 2014 county distribution map It grows along the shores of lakes, marshes, and other wetlands, frequently those with acidic water such as Sphagnum bogs.Biota of North America Program Sagittaria teres
Conservation It is listed as endangered in Connecticut,"Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 19 January 2018. (Note: This list is newer than the one used by plants.usda.gov and is more up-to-date.) New Jersey, New York, and Rhode Island. It is listed as a special concern in Massachusetts.
References
External links Adrienne L. Edwards & Rebecca R. Sharitz. 2000. Population genetics of two rare perennials in isolated wetlands: Sagittaria isoetiformis and S. teres (Alismataceae). American Journal of Botany August 2000 vol. 87 no. 8 1147-1158 includes genetic and ecological information on both species, plus distribution map