The ecoregion is divided into two sub-regions, chiefly based on the amount of precipitation. The understory of
evergreen broadleaf shrubs is characteristic for both sub-regions. Notable species in the understory include various rhododendrons such as
Pontic rhododendron (
Rhododendron ponticum);
Black Sea holly (
Ilex colchica),
cherry laurel (
Prunus laurocerasus),
Caucasus (
Buxus colchica) and
common box (
Buxus sempervirens),
Caucasian whortleberry (
Vaccinium arctostaphylos) etc. From a European perspective, the majority of these count as
relict species from the
Tertiary period. The vegetation is diverse and varies with elevation. which meets the Black Sea in the city of
Ordu, and extend across the
Bosporus along the Black Sea coast of European Turkey to Bulgaria. The Euxine forests receive an average of 1000 to 1500 mm precipitation annually. The Bulgarian part of the ecoregion lies within
Strandzha Nature Park, where it borders on and transitions into the
Balkan mixed forests ecoregion. Rare habitat types include
coastal sand dunes and
peatlands. ==Fauna==