The paper presents result of geobotanical survey of the southern part of Perm Region and northern regions of the Republic of Bashkortostan are presented; the distribution of Heracleum sosnowskyi Manden. in segetal (weed-field) communities is revealed. In the syntaxonomic space, the communities were classified in the association Conio maculatum – Stachietum palustris Khasanova et al 2018. New localities of the species in cultivated fields of Tatyshlinski district of the Republic of Bashkortostan were revealed. It has been established that Heracleum sosnowskyi infiltrates into the communities of grain crops – wheat, oats, barley and rye.

G.R. Khasanova, V.V. Korchev, S.M. Yamalov, A.A. Kamaletdinova