What is another word for grass vetch?
Pronunciation: [ɡɹˈas vˈɛt͡ʃ] (IPA) 
Grass vetch, also known as Tufted vetch or Bird vetch, is a legume plant that is found across Europe and Asia. This plant is characterized by its clusters of purple-blue flowers that bloom in the spring and summer months. There are several synonyms for grass vetch or Tufted vetch, some of which include: cow vetch, purple vetch, blue vetch, wild pea, and hayberry. Cow vetch and purple vetch are commonly used interchangeably with grass vetch. Blue vetch is another name that is mostly used in North America. Wild pea is a term used colloquially, and hayberry describes its use as a fodder for livestock.
