This species-rich sand grassland type occurs at the north-western distribution limits of the alliance Festucion vaginatae and it is transitional towards the alliance Corynephorion canescentis. Its stands are dominated by Festuca vaginata subsp. dominii, Corynephorus canescens, and in places, Stipa borysthenica. Unlike most other communities of the Festucion vaginatae, they occur on base-poor acidic sands. In the Czech Republic they are restricted to a few sites in the sand area near Hodonín in southern Moravia, where they develop from initial Corynephorus canescens grasslands on slightly consolidated sand dunes.