[Wikipedia] Taxonomy: It has a few common names including 'creeping wart cress', 'warty swine-cress', which is derived from the distinctive fruits, 'crowfoot' (it's leaf shape), 'greater swine cress' and 'swine cress'. The name 'swine cress' comes from its use as a poor quality salad alternative and thought only suitable for eating by pigs. (link added by Mary Ann Machi)