These are semi-closed to closed dry grasslands mostly dominated by Brachypodium pinnatum or Bromus erectus. Usually they occur on gentle, south-facing slopes with heavy calcareous soils over Cretaceous and Tertiary sediments. In most places this vegetation develops at sites potentially supporting thermophilous oak or hornbeam forests. It was traditionally grazed or mown for hay, but most sites became abandoned. This grassland is widespread in lowlands and along adjacent upland fringes of northern, central and eastern Bohemia, as well as of central, eastern and southern Moravia.