Key to Tasmanian Dicots
Hydatellaceae 4b:359  
The Hydatellaceae are a small and ancient family of aquatic herbs containing a single genus, Trithuria (although some species were previously recognised as a different genus, Hydatella). Although they were traditionally placed among the monocots because they superficially resemble tiny grasses or sedges, they are in fact related to the water lilies.

Tasmania has one species of each of the two genera in this family. Both are tiny aquatic/subaquatic species.


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Key to Species