cirsium_arvense
1. [ noun ] (botany) European thistle naturalized in United States and Canada where it is a pernicious weed
Synonyms: creeping_thistle Canada_thistle
Related terms: plume_thistle
Similar spelling:   Cirsium_vulgare
  Cirsium_rivulare
  Cirsium_discolor
  Cirsium_flodmanii