Kebnat
PLANTS

Greater duckweed

Spirodela polyrhiza

Plants
NativeHerbPerennial
Greater duckweed, photo 1 of 5
Greater duckweed, In flower
Greater duckweed, In fruit

Perennial herbaceous plant. Grows in marshes.

There are 126 observations of Greater duckweed in Québec, mostly in Montérégie, Outaouais and Estrie, and it has been reported in 13 of the 17 regions. They peak from June to August and become rare from October to May.

Through the year

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Where to see it

  1. Montérégie53
  2. Outaouais16
  3. Estrie13
  4. Bas-Saint-Laurent8
  5. Capitale-Nationale8
  6. Lanaudière6
  7. Laurentides6
  8. Montréal4
  9. Abitibi-Témiscamingue4
  10. Laval3
  11. Saguenay–Lac-Saint-Jean3
  12. Centre-du-Québec1
  13. Mauricie1

Habitat

MarshAlexander Rumpel

Similar species

TOXIC
Common duckweedLemna minor
Common frogbitHydrocharis morsus-ranae
Turion duckweedLemna turionifera
Water lettucePistia stratiotes
WatercressNasturtium officinale
Inflated duckweedLemna gibba
Star duckweedLemna trisulca
WatershieldBrasenia schreberi
Curly pondweedPotamogeton crispus
Pond water-starwortCallitriche stagnalis
Fringed HeartwortRicciocarpos natans
MoneywortLysimachia nummularia