Potamogeton crispus L.
curled pondweed (curly pondweed)
Potamogetonaceae (Horned pondweed family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #14159)


E-Flora BC Static Map

Distribution of Potamogeton crispus
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Species Information

Perennial, aquatic herb from fibrous roots; stems compressed, branched, up to 150 cm long.
All submersed, narrowly oblong with parallel sides, 1-10 cm long, 0.4-1 cm wide, with 9 to 35 veins, attached at the nodes, the tips rounded, the bases rounded and toothed, the margins wavy, with tiny teeth, dark green and crispy, stipules inconspicuous, 0.5 cm long.
Inflorescence spikelike, the spikes 2.5-4 cm long, with 3 to 5 whorls of flowers, the stalks thin.
Achenes, lanceolate, 5-6 mm long (including the beaks), 2-2.3 mm wide, the beaks 2-3 mm long, prominent, pointed, the keels well-developed, toothed.
Stem anatomical characters Interlacunar and subepidermal bundles absent, pseudohypodermis 1 cell thick, endodermis of O-cells.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat and Range

Nutrient rich lakes, ponds and sloughs in the lowland and steppe zones; common in S BC south of 50 degrees N; introduced from Eurasia.

SourceThe Illustrated Flora of British Columbia