This thermophilous vegetation type is dominated by the tall herb Dictamnus albus, accompanied by several broad-leaved herbs typical of semi-dry grasslands and the understorey of thermophilous oak forests. It is usually found on steep, south-facing slopes in the warm, dry areas of northern and central Bohemia and southern Moravia. The bedrocks are usually base-rich, including limestone, basalt or loess. This association is linked to thermophilous oak forests, occurring along both natural and secondary forest edges.