watercress : Idioms & Phrases
american watercress
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       noun mat-forming perennial found in cold springs of the eastern United States
       
       
 American watercress; Cardamine rotundifolia.
 
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       noun of southwestern Europe; cultivated in Florida
       
       
 Barbarea verna; early winter cress; American cress; Belle Isle cress; Barbarea praecox; land cress.
 
WordNet
common watercress
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       noun perennial Eurasian cress growing chiefly in springs or running water having fleshy pungent leaves used in salads or as a potherb or garnish; introduced in North America and elsewhere
       
       
 Nasturtium officinale; Rorippa nasturtium-aquaticum.
 
WordNet
mountain watercress
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       noun mat-forming perennial found in cold springs of the eastern United States
       
       
 American watercress; Cardamine rotundifolia.
 
WordNet
yellow watercress
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       noun annual or biennial cress growing in damp places sometimes used in salads or as a potherb; troublesome weed in some localities
       
       
 marsh cress; Rorippa islandica.