Lemna disperma

Common Duckweed

Leaf-like elliptic to rounded herb, 1-4mm long, with single root, floating on water. Body is slightly swollen, green above, reddish below, with 3-5 veins all rising from the same point. Single plants can join to form colonies.

Additional information

  • SynonymSeparated from Lemna minor, an introduced plant.
  • FamilyAraceae (syn. Lemnaceae)
  • StoreyLower storey
  • Sizeplants 1-4 mm long
  • Plant groupingAquatic & Semi aquatic
  • Flower colourWhite
  • Flowering timeSpring
  • FlowersMinute flowers on the margin, 1 male, 2 female. Young plants emerge from a pocket on the margin.
  • Bird attractingLeaves
  • Butterfly attractingNo
  • Frog habitatNo
  • Growing conditionsAquatic in still water.
  • Garden useQuick growing to form colonies on ponds and dams. Provide hiding places for fish.
  • Commercially availableNever
  • Conservation statusSignificant within the Shire. Known from very few local sites.
  • Related speciesThe weed species L. minor is less common. It is flat and has only 3 veins. If there are ever more then the outer veins branch from the inner veins. It grows 1-8 mm long.
Photographer/s: 1, 2 (with Wolffia) Murray Fagg © Australian National Botanic Garden; 3 Marilyn Bull ©

Plant Communities

  • 11 Manna Gum Riparian Forest - Central Highlands (EVC 18)
  • 47 Open Water - Reservoirs, lakes, etc (EVC 718)
  • 35 Floodplain Wetland Complex (EVC 172)
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