Page authors: Don Knoke, David Giblin
Sagittaria cuneata
arumleaf arrowhead, northern arrowhead, Sagittaria cuneaire, wapato

Distribution: East of the Cascades in Washington; British Columbia south to California, east to New York.

Habitat: Ponds, lake shores and ditches.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Generalist


Aquatic, scapose, tuber-bearing perennial from strong rhizomes, the scapes up to 5 dm. long.


Leaves mostly emersed or the blades floating, but sometimes submerged; emersed leaves with sagittate blades 1-12 cm. long and up to 6 cm. broad; floating leaves linear or ovate; submerged leaves linear, up to 4 dm. long and 2-10 mm. broad.


Flowers in whorles of 3 in bracteate racemes, the bracts lanceolate, 5-30 mm. long; lower whorles pistillate, the pedicles 5-20 mm. long, ascending, longer in the staminate flowers in the upper whorles; sepals 3, 5-8 mm. long, persistent; petals 3, white, longer than the sepals; stamens 15-25; pistils many on a globose receptacle.


Achenes 2-2.5 mm. long, winged, the stylar beak straight, 0.2-0.4 mm. long.

Accepted Name:
Sagittaria cuneata E. Sheldon
Publication: Bulletin of the Torrey Botanical Club. 20:283, plate 159. 1893.

Synonyms & Misapplications:
Sagittaria arifolia Nutt. ex J.G. Sm.
Additional Resources:

PNW Herbaria: Specimen records of Sagittaria cuneata in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Sagittaria cuneata checklist entry

OregonFlora: Sagittaria cuneata information

E-Flora BC: Sagittaria cuneata atlas page

CalPhotos: Sagittaria cuneata photos

23 photographs:
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