Abstract
Two new Juniperus communis subsp. communis syntaxa from Romania are presented from floristic, ecological and syntaxonomic points of view, completing the picture of the European distribution area of these shrubby communities. The phytocoenoses of Thymio odoratissimi-Juniperetum communis ass. nova are present on calcareous substrates and are rich in continental Eurasian, meso-xerophilous species, for which reason we assigned it to alliance Brachypodio pinnati-Juniperion communis Mucina et al. 2016, and class Crataego-Prunetea Tx. 1962. The communities belonging to Vaccinio myrtilli-Juniperetum communis Kovács ex Filipaș et al. campanuletosum abietinae subass. nova occur on acidic substrates, crystalline schists and gresous formations, and are rich in acidophilous species, characteristic for the class Calluno-Ulicetea Br.-Bl. et Tx. ex Klika et Hadač 1944. We assigned this new syntaxon to alliance Vaccinio-Juniperion communis Passage in Passage et G. Hoffman 1968 because of the high presence of Vaccinium species (V. myrtillus, V. vitis-idaea) in the sub-shrub layer of these phytocoenoses.
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