Właściwości zagrożonych gatunków flory segetalnej środkowej Polski i możliwości ich ochrony
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The paper present the results of the analysis of features of a group of 95 threatened segetal flora species in Central Poland. The basis of the analysis was mainly a preliminary list of the threatened segetal plant species of this part of Poland (Warcholińska 1986-1987a). Richness of species and their systematic, geographical, ecological and dynamic character were analyzed. The causes of recession of such a numerous group of field weeds species were stated as well as the possibilities of their protection.