Kebnat
PLANTS

Water knotweed

Persicaria amphibia

Plants
NativeHerbPerennial
Water knotweed, In flower
Water knotweed, Flower buds
Water knotweed, No flowers or fruits

Perennial herbaceous plant. Grows in marshes.

There are 474 observations of Water knotweed in Québec, mostly in Outaouais, Montérégie and Laurentides, and it has been reported in 16 of the 17 regions. They peak in August and September and become rare from October to May.

Through the year

JFMAMJJASOND

Where to see it

  1. Outaouais97
  2. Montérégie84
  3. Laurentides67
  4. Estrie38
  5. Montréal36
  6. Capitale-Nationale29
  7. Abitibi-Témiscamingue26
  8. Nord-du-Québec21
  9. Chaudière-Appalaches18
  10. Laval15
  11. Mauricie13
  12. Bas-Saint-Laurent12
  13. Lanaudière9
  14. Centre-du-Québec6
  15. Saguenay–Lac-Saint-Jean2
  16. Côte-Nord1

Habitat

MarshAlexander Rumpel

Similar species

Spotted ladysthumbPersicaria maculosa
Curlytop knotweedPersicaria lapathifolia
Pennsylvania smartweedPersicaria pensylvanica
Oriental lady's thumbPersicaria longiseta
Swamp smartweedPersicaria hydropiperoides
Common BistortBistorta officinalis
Longleaf pondweedPotamogeton nodosus
Broadleaf pondweedPotamogeton natans
Kiss me over the garden gatePersicaria orientalis
JumpseedPersicaria virginiana
Swamp milkweedAsclepias incarnata
Swamp loosestrifeDecodon verticillatus