E-Flora BC: Electronic Atlas of the Flora of British Columbia

Potamogeton strictifolius Benn.
stiff-leaved pondweed (narrowleaf pondweed)
Potamogetonaceae (Horned pondweed family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #30176)

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Distribution of Potamogeton strictifolius
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Species Information

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Perennial, aquatic herb from fine, tufted roots; stems up to 100 cm long, branched at the base.
All submersed, 2-ranked, linear, the sides parallel, stiff, brownish-green, 3-7 cm long, 0.1-0.3 cm wide, usually with 3 veins, gradually tapered into sharp bristled tips, the stipules 1-3 cm long, coarsely fibrous, whitish, the older tending to disintegrate into shreds, the margins fused towards the bases, the glands at the nodes small and inconspicuous.
Inflorescence spikelike, the spikes 0.5-1.5 cm long, with 2 to 5 whorls of flowers, the stalks thin; winter buds cylindrical, the bases hard, strongly ribbed.
Achenes, egg-shaped, 1.8-2.2 mm long, 1.2-1.8 mm wide, widest at the middle, the beaks short, the keels absent.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Lakes in the lowland and montane zones; rare in S BC; N to YT and NT, E to NF and S to NH, NY, VA, IN, WI, MN, NE, WY, UT and ID.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Potamogeton longiligulatus Fernald
Potamogeton pusillus var. rutiloides (Fernald) B. Boivin
Potamogeton rutilus auct. non Wolfgang
Potamogeton strictifolius var. rutiloides Fernald
Potamogeton strictifolius var. typicus Fernald

Taxonomic and Nomenclatural Links

Additional Photo Sources

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General References