Sagittaria graminea, the grassy arrowhead or grass-leaved arrowhead, is an aquatic plant species native to eastern North America. It is known from every Canadian province from Ontario to Newfoundland, and every US state from the Great Plains to the Atlantic, plus Colorado, New Mexico and Cuba. It is considered naturalized in Washington State and in Vietnam.
A long list of varietal and subspecific names have been proposed over the years. Most have either been elevated to the species level or relegated to synonymy. At the present time (April 2014) only two are recognized:
- Sagittaria graminea subsp. graminea
- Sagittaria graminea subsp. weatherbiana (Fernald) R.R.Haynes & Hellq.
- The Plant List, Sagittaria graminea
- "Sagittaria graminea". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 October 2015.
- "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
- "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". apps.kew.org. Retrieved 2017-01-30.
- "Sagittaria graminea in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2017-01-30.
- André Michaux. 1803. Flora Boreali-Americana 2: 190, Sagittaria graminea.
- Garden., Missouri Botanical (1996-01-01). "Novon". v. 6 1996. ISSN 1055-3177.