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Botanical Family · Alismatales

Lemnaceae

Arum Family

2 speciesOrder Alismatales2+ well-known plants

The Lemnaceae family (Arum Family) is a botanical family placed in the order Alismatales. In the SASYA catalogue it spans 2 species. Its members are predominantly herbs. Several members are valued in traditional medicine. Familiar examples include Common Duckweed and Duckweed.

Browse all 2 species ↓
Representative LEMNACEAE specimen
Representative specimen · Lemnaceae
Key pattern

The world's smallest flowering plants: a tiny flattened green disc or frond, often just a few millimetres across, floating freely on still water with a single thread-like root, or none at all, hanging below.

Flowering is rare and easy to miss — most reproduction happens vegetatively, with a parent frond simply budding off a genetically identical daughter frond that separates and floats away on its own.

Identify the species

Which Lemnaceae species is this?

Answer what you can see and narrow it down to a single Lemnaceae species.

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Key TraitWhat single feature best distinguishes it?
Extremely tiny floating duckweed fronds
Tiny floating leaf-like body with a swollen underside (common duckweed)

Typical flower & fruit

  • Flower symmetryVariable
  • InflorescenceSpike
  • FruitVariable

Typical of the family — flowering plants only; species can vary.

Notable members

Common DuckweedLemna gibbaDuckweedLemna perpusilla

All 2 species in LEMNACEAE

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