yellow cress

noun
  1. any of various species of cress (Rorippa) that are related to watercress and have yellow flowers. They are not confined to water margins and some are garden weeds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012