Abstract
New plant communities of thermophilous oak forests of the associations Omphalodo scorpioidis-Quercetum roboris ass. nova hoc loco and Lasero trilobi-Quercetum roboris ass. nova hoc loco. belonging to the alliance Lathyro pisiformis-Quercion roboris Solomeshch et Grigoriev in Willner et al. 2016 are described. These plant communities are floristically affluent and contain a large number of meadows-steppe and forest fringe species. In the territory of the Southern Ural region, these communities have the fragmented range and limited to relatively small patches near the tops of ridges and on the steep southern slopes of mountains and hills. Based on the comparison of floristic composition of these communities and other syntaxons of oak forests early described in the region, the combinations of diagnostic species of new associations are proposed.
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