Research carried out in 51 tended and untended landscape-style country parks (18th and 19th century) situated in the Sandomierska Basin, Poland, provided a basis for determining the extent to which the vegetation of the parks has been transformed. Using the historical-geographical classification of plants it was found that autochthonous species have a larger percentage cover in the vegetation layers (trees, shrubs, herbs) of untended parks, i.e. objects with a non-mown herb layer. The species composition of the vegetation of untended parks bears greater similarity to natural oak-hornbeam forest communities, which indicates that the sites of such parks have been changed to a small degree. The vegetation of the country parks, especially the large-sized untended ones, reflects the natural succession transformations.

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