In a population study of the endangered species Pulsatilla patens and P. pratensis conducted between 2010 and 2019 in two active military training areas (Nowa Dęba, Lipa), we found that the pasque flower metapopulations consisted of widely dispersed small clusters or single individuals. They inhabited psammophilous grassland, dry heath, forest edges and initial pine forest. In Lipa we found 34 clumps of P. patens and 9 clumps of P. pratensis, and in Nowa Dęba 2 and 25 clumps, respectively. The share of generative plants in the study period ranged from 0.19 to 0.56 for P. patens and from 0.44 to 0.52 for P. pratensis. Based on detailed monitoring of P. patens at seven sites, we determined that the number of individuals had gradually decreased, resulting in reduction of the population by almost half over the decade. At the same time we observed a pronounced fluctuation in the number of generative clumps and flowering shoots. Neither seedlings nor juvenile plants of P. patens were found during the study period.