title: <i>Stipo pulcherrimae-Festucetalia pallentis</i> Pop 1968 of calcareous petrophytic steppes in Ukraine
abstract: Abstract Nine hundred and eight-nine relevés from calcareous petrophytic steppes in Ukraine and its adjacent territories were assessed with the help of expert systems to determine the syntaxonomic affiliation of the plant communities at class and order levels. At least 488 relevés belonging to the class Festuco-Brometea were analyzed using the TWINSPAN algorithm, and 8 distinctive clusters were obtained, recognized as alliances of the order Stipo pulcherrimae-Festucetalia pallentis . A new allia
journal: Hacquetia