The adaptation of Beckmannia eruciformis in cultural meadow communities is analysed. According to the research results, Beckmannia eruciformis in the grass mixtures is desistant. Optimal conditions for growing the species is 1-15 cm of groundwater. Beckmannia eruciformis, in such conditions, supresses other species and predominates in the grass composition from the fourth to the twentient year of the meadow’s development.
Keywords: Beckmannia eruciformis, adaptation, cultural meadows, Lithuania.