This alliance includes woodlands of Robinia pseudoacacia in dry habitats, which have grass-dominated herb layers with Arrhenatherum elatius, Bromus sterilis, Calamagrostis epigejos, Elymus repens and Poa angustifolia. In areas with continental climate such as southern Moravia and south-eastern central Europe thermophilous species including vernal ephemerals and geophytes are well represented.