Sagittaria cuneata is a species of flowering plant in the water plantain family known by the common name arumleaf arrowhead or duck potato. Like some other Sagittaria species, it may be called wapato. It is native to much of North America, including most of Canada (every province and territory except Nunavut) as well as the western and northeastern United States (New England, Great Lakes, Great Plains, Rocky Mountain, Great Basin and Pacific Coast states; including Alaska but not Hawaii).
Sagittaria cuneata is an aquatic plant, growing in slow-moving and stagnant water bodies such as ponds and small streams. It is quite variable in appearance, and submerged parts of the plant look different from those growing above the surface or on land. In general it is a perennial herb growing from a white or blue-tinged tuber. The leaves are variable in shape, many of them sagittate (arrow-shaped) with two smaller, pointed lobes opposite the tip. The leaf blades are borne on very long petioles. The plant is monoecious, with individuals bearing both male and female flowers. The inflorescence which rises above the surface of the water is a raceme made up of several whorls of flowers, the lowest node bearing female flowers and upper nodes bearing male flowers. The flower is up to 2.5 centimeters wide with white petals. The male flowers have rings of yellow stamens at the centers. Each female flower has a spherical cluster of pistils which develops into a group of tiny fruits.
- US Department of Agriculture Plants profile, Sagittaria cuneata'
- photo of herbarium specimen at Missouri Botanical Garden, collected in Idaho, isoepitype of Sagittaria cuneata
- photo of herbarium specimen at Missouri Botanical Garden, collected in New Mexico, Sagittaria cuneata
- Washington Burke Museum Sagittaria cuneata'
- Photo gallery Sagittaria cuneata'
- Washington State Department of Ecology, Shoreline Plants, Sagittaria cuneata
- Plants for a Future, Sagittaria cuneata
- Wildflowers of the Pacific Northwest, Turner Photographics, Sagittaria cuneata arum-leaf arrowhead
- The Plant List Sagittaria cuneata
- "Sagittaria cuneata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 October 2015.
- "Sagittaria cuneata in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2017-01-30.
- Biota of North America Program, map, Sagittaria cuneata
- "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". apps.kew.org. Retrieved 2017-01-30.
- "UC/JEPS: Jepson Manual treatment for SAGITTARIA cuneata". ucjeps.berkeley.edu. Retrieved 2017-01-30.
- "Plants Profile for Sagittaria cuneata (arumleaf arrowhead)". plants.usda.gov. Retrieved 2017-01-30.
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- Blankinship, Joseph William. 1905. Science Studies, Montana College of Agriculture and Mechanic Arts. Botany, Bozeman 1: 40, pl. 6, Sagittaria paniculata