'American watercress' definitions:

Definition of 'American watercress'

From: WordNet
noun
Mat-forming perennial found in cold springs of the eastern United States [syn: American watercress, mountain watercress, Cardamine rotundifolia]
noun
Of southwestern Europe; cultivated in Florida [syn: Belle Isle cress, early winter cress, land cress, American cress, American watercress, Barbarea verna, Barbarea praecox]