Abstract
The AssociationErysimo - TrifolietumMicev. 1977 in Bulgaria and Some Remarks on its Mediterranean CharacterWe endeavor to enlarge the knowledge about Bulgarian vegetation diversity. Data on seminatural grasslands containing 344 relevés, collected in Southeast Bulgaria were analyzed by the combine method, using TWIN-SPAN and the Cocktail method. TheErysimo diffusii-Trifolietum angustifoliiassociation and the allianceTrifolion cherleriwere established for the first time in Bulgaria. So far the presence of this association was known for Macedonia. The aims of our study are to present more data about theErysimo-Trifolietumin Bulgaria and to make some comments about its affiliation toHelianthemetea guttati.The association is characterized ecologically and floristically. Analysis of the floristic elements shows that the most numerous are sub-Mediterranean species. Analysis of the life forms shows that these communities are hemicryptophyte-therophytic. A review of syntaxonomical systems and association assignment to higher syntaxa were made. According to current European vege-tation surveys the association should be related to classHelianthemetea guttati.Our results reveal an intermediate character of the studied vegetation - closed dry grasslands, with distinct presence ofFestuco-Brometeaspecies with a high percent of therophytes and Mediterranean floristic elements related toHelianthemetea guttatias well.
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