Weed plants of the European part of Russia

Data on the weed plants species diversity in the European part of Russia (EPR) are presented. The weed plants refer to the plants that are not specially cultivated but adapted to grow in arable areas and reduce the crops size and quality. The data set was compiled by the authors' own research from 1999 to 2019. Herbarium samples are stored in the herbarium collections of the Ural Federal University (UFU), the All-Russian Institute for Plant Protection, Botanical Institute named after V. L. Komarov (LE), Udmurt State University (UDU), South Ural Botanical Garden Institute. The data set contains 2049 sampling events, which include 24,284 observations of the weed plants occurrence (associated occurrence) in arable lands in the EPR. The data set includes 330 species of vascular plants growing in 60 cultivated crops: spring and winter crops, industrial crops, row crops, perennial grasses. This data set is the first and important step to summarize the information on the current diversity and geographical distribution of weed plants in the EPR.