Nine plant communities of greater cover and three fragmentarily developed communities were identified. Said communities belong to forest, grassland, weed and ruderal vegetation, halophytic vegetation of coastal reefs and to vegetation of walls and rocks.
The most common is the forest vegetation which covered about three quarters of the Arboretum before the fire in the year 2000. In the western part these were stands of Aleppo pine and cypress developed on the basis of garrigue, which have returned to their original plant formation after the fire through natural regeneration. In the eastern part of the Arboretum forest vegetation was developed with laurel as the predominant species, where it also covers most of the Renaissance garden.
The phenomenon of mixing of species of the eumediterranean and sub-Mediterranean vegetation zone is observed here as a distinctive feature of the vegetation of the Arboretum. The south-eastern part of the Arboretum forms a very steep and rocky slope with distinctly eumediterranean garig vegetation and fragments of extra zonal vegetation of the Ionian-Aegean zone, as one of our few localities of woody spurge (Euphorbia dendroides L.).
In previous research 9 plant communities with higher cover were identified, while 3 were fragmentarily developed.
