Relict plant species
In the area of Djerdap National Park there is a recorded presence of 13 species of tertiary relics (Berberis vulgaris, Celtis australis, Comandra elegans, Cotinus coggygria, Hedera helix, Ilex aquifolium, Juglans regia, Ostrya carpinifolia, Ruscus aculeatus, Ruscus hypoglossum, Staphylea pinnata, Syringa vulgaris, Taxus baccata). Tertiary relics compose 1.28% of the total number of all species if the explored area. Pertinent relic and endemic species found in the Balkans which grows across Djerdap Gorge, especially on steep calcareous slopes of Miroc and lateral canyons of Danube tributaries, would be lilac (Syringa vulgaris). Its most typical habitat are steep calcareous slopes where forest cannot thrive, so that lilac composes thick and impervious shrub formations, which are known in the scientific literature as shrubbery. Lilac shrubbery are not only a natural value, but also an ornament of entire Djerdap Gorge.
Presence of a large number of tertiary relics is explained by the role of Djerdap Gorge and its steep calceraneous slopes as the refuge for ancient tertiary medieval forest fauna. While fleding away from ice age, herbal species found safe habitat precisely in the deep and wide Djerdap Gorge, damp so called “Djerdap climate“ without severe temeprature fluctuations and reduced climatic extremes.