Sagittaria guayanensis, the Guyanese arrowhead, is an aquatic plant species. It is predominantly tropical, native to Mexico, Central America, the West Indies, and much of South America, as well as West Africa (from Senegal to Cameroon), south and southeast Asia (from Afghanistan to Taiwan to Indonesia), plus Sudan and Madagascar. It was unknown in the United States until a few populations were reported from Louisiana in 1969.
The epithet has incorrectly been spelled "guyanensis" by some authors. Type locale is not Guyana but rather in the Guayana region in what is now eastern Venezuela, regarded as part of Colombia when the specimen was collected.
- The Plant List, Sagittaria guayanensis
- "Sagittaria guayanensis". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 October 2015.
- "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". apps.kew.org. Retrieved 2017-01-30.
- Thieret, J. W. 1969. Sagittaria guayanensis (Alismaceae) in Louisiana: New to the United States. Sida 3: 445.
- "Sagittaria guayanensis in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2017-01-30.
- Aimé,, Bonpland,; von,, Humboldt, Alexander; Sigismund,, Kunth, Karl (1815-01-01). "Nova genera et species plantarum :". v. 1.
- photo of herbarium specimen at Missouri Botanical Garden, Sagittaria guayanensis collected in Nicaragua
- Flora of Pakistan Sagittaria guayanensis
- Especies disponsibles de Costa Rica, Sagittaria guayanensis
- West African Plants, a photo guide, Sagittaria guayanensis
- Plantes des Rizieres de Guyane, Cirad, Sagittaria guayanensis