Canadian waterweed, Elodea canadensis


Short description of Elodea canadensis, Canadian waterweed

Canadian waterweed is an aquatic herb with branching stems <30 cm long with leaves in whorls of (2-)3-4 which are widest above the middle, rounded at the tip and now twisted by recurved.

Description of Elodea canadensis, Canadian waterweed status in GB

Canadian waterweed occurs throughout most of GB, being absent only from parts of north-west Scotland, western Ireland and higher altitudes in other areas.

Habitat summary: Elodea canadensis, Canadian waterweed

Canadian waterweed is most abundant in nutrient-rich lakes and ponds both in its native and invasive range; however it will also grow in flowing water, even in areas with fast flow, although it rarely forms dense beds in such conditions.

Overview table

Environment: Freshwater
Species status: Non-Native
Native range: Western United States Temperate, Eastern United States Temperate, Canada Temperate
Functional type: Land plant
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: Dun's Castle, Scotland
Date of first record: 1842

Distribution map

GB Distribution from BSBI

Author's name:

R.V. Lansdown

Last updated:

November 27th 2015

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