This report includes data on rare plant species of steppe and forest-steppe pine forests. We have identified the proportion of rare species that live in the studied forests for the regions where they are located, and for Russia as a whole. We have identified regional species found only in pine forests. The article shows that pine forests play an important role in the conservation of forest (boreal, boreonemoral, nemoral and boreonemoral forest-steppe) species and in the conservation of regional phytodiversity.