palustris (2009)

Lemna trisulca

Star Duckweed

Aquarium suitability: yes
Usage: Water surface
Difficulty: easy
Growth: fast
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Common names: 
  • Star Duckweed
  • Ivy Duckweed

  • Staurogeton trisulcus (L.) Schur

Habit, plant type:

  • free-floating submerged plant
Botanical name [?]: Lémna trisúlca L.

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Alismatales
Family: Araceae
Genus: Lemna


Lemna trisulca is an uncommon Lemna species and not easily identified as such at first glance. Other than the well-known duckweed (Lemna minor and other species), L. trisulca forms floating populations below the waterline. Its crosswise-growing leaflike fronds hang together and thus form large cushions in the water. Every frond has a transparent margin that is toothed at the front.

L. trisulca grows in stagnant waters poor in phosphate with a conductivity of mainly over 100 Mikrosiemens/cm vor, where it is often found floating under the cover of other duckweed species (Lemna, Spirodela). During the winter it keeps growing, forming shorter and wider fronds that sink to the ground, where they keep growing at a slower rate.

To be continued...

References and further reading:
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