Research was carried out in 51 country parks in the Sandomierska Basin to characterise the floral and phytosociological diversity of their herb layer. The parks, minimum 2 ha in area, were established in the 18^th or 19^th century in a landscape style on the Tilio-Carpinetum (Małopolska variety) sites. The country parks were divided into groups according to two variables: (i) tending (understood as mowing of the herb layer), and (ii) size. The results of the research indicated that both variables have an effect on the species composition of plants in the herb layer. The percentage cover of Querco-Fagetea plant species in the herb layer of non-tended large-sized country parks and natural oak-hornbeam forest communities is higher than in tended parks.

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