Sagittaria
arrowhead
6 species
1 subspecies and varieties
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Sagittaria cuneataarumleaf 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.
Origin: Native
Flowers: June-August
Sagittaria gramineagrassy arrowhead
Distribution: Occurring west of the Cascades in Washington; primary distribution is east of the Mississippi River.
Habitat: Wetlands, ponds, and lakes
Origin: Introduced
Flowers: June-August
Sagittaria latifoliacommon arrowhead, duck potato, wapato
Distribution: Occurring on both sides of the Cascades in Washington; Vancouver Island, British Columbia south to central California; primary distribution in central and eastern North America.
Habitat: Ditches, ponds, lakes, swampy areas.
Origin: Native
Flowers: July-September
Sagittaria platyphylladelta arrowhead
Distribution: Known from the Puget Sound lowlands in Washington; south-central U.S., and in scattered locations in central and northeastern U.S.
Habitat: Pond and lake margins.
Origin: Introduced
Flowers: June-August
Sagittaria rigidasessile-fruited arrowhead
Distribution: Occurring in lowland areas west of the Cascades crest in Washington; California; central U.S. and southern Canada east to northeastern U.S. and Canada; scattered locations elsewhere in U.S. and Canada.
Habitat: Pond and lake margins.
Origin: Introduced from eastern North America
Flowers: June-August
Sagittaria subulataawl-leaf arrowhead
Origin: Introduced from tidewaters in eastern North America