Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho and Montana, and much of north central and northeast United States and adjacent Canada.
Habitat: Lakes, ponds and streams.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Aquatic, herbaceous perennials from slender rhizomes, the stems flattened and somewhat winged, 2-3 mm. broad, constricted at the nodes, freely branched, up to 6 dm. long.
Leaves all submersed, linear, up to 20 cm. long and 3-5 mm. broad, not at all clasping; stipules free of the leaf blade, 1-3 cm. long, whitish, firm.
Flowers in dense spikes 1-2.5 cm. long; peduncles stout, flattened, up to10 cm. long; perianth of 4 clawed segments, each with an upturned, oval blade; stamens 4, fused with the claws; pistils 4, sessile.
Flowers in dense spikes 1-2.5 cm. long; peduncles stout, flattened, up to10 cm. long; perianth of 4 clawed segments, each with an upturned, oval blade; stamens 4, fused with the claws; pistils 4, sessile.
Publication: Memoirs of the american academy of arts and science. n.s. 17:36. 1932.
PNW Herbaria: Specimen records of Potamogeton zosteriformis in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Potamogeton zosteriformis checklist entry
OregonFlora: Potamogeton zosteriformis information
E-Flora BC: Potamogeton zosteriformis atlas page
CalPhotos: Potamogeton zosteriformis photos
