greater_knapweed
1. [ noun ] (botany) tall European perennial having purple flower heads
Synonyms: Centaurea_scabiosa great_knapweed
Related terms: knapweed
Similar spelling:   great_ragweed
  greater_scaup
  Greater_London
  greater_celandine
  greater_yellowlegs
  greater_omentum
  greater_burdock
  greater_new_york