Key to Tasmanian Dicots
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Egeria (Hydrocharitaceae) 4b:8    
Egeria densa is a widely cultivated species of fishponds and aquaria, but has become uncommon aquatic weed of ponds and streams in Tasmania. It grows submerged, and forms a tangled mass of stems. The leaves are soft and in whorls of four. It resembles its relative Elodea canadensis, but has thicker stems and larger leaves and flowers.
 

 
University of Tasmania
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