Združba puhastega hrasta in črnega gabra je conalna združba submeditenskega območja in jo najdemo na različnih legah in nagibih na karbonatni podlagi. Tla so rendzine. Klima je submediteranska, letna količina padavin je 1250 mm in povprečna letna temperatura 12° C.

Diagnostična kombinacija rastlinskih vrst
Drevesna plast: črni gaber (Ostrya carpinifolia), puhasti hrast (Quercus pubescens), mali jesen (Fraxinus ornus).
Grmovna plast: Cornus mas, Crataegus monogyna, Fraxinus ornus, Juniperus communis, Ostrya carpinifolia, Quercus pubescens.
Zeliščna plast: Asparagus tenuifolius, Brachypodium ruprestre, Dorycnium herbaceum, Sesleria autumnalis.
Mahovna plast: Hypnum cupressiforme.

Sestojne oblike so različne, pretežno je mešan sestoj panjevca in semenovca. Drevesna plast je navadno visoka med šestimi in petnajstimi metri in ima pokrovnost med 80 in 90 %. Prav tako sta dobro razviti grmovna in zeliščna plast.

Gozd puhastega hrasta in črnega gabra je s stališča pridobivanja lesnih sortimentov nepomemben in ima predvsem varovalno vlogo, saj ščiti območje pred ujmami in tla pred erozijo. Po drugi svetovno vojni je bilo opuščenih veliko pašnikov, ki se danes postopoma zaraščajo z združbo puhastega hrasta in črnega gabra.

Združbo puhastega hrasta in črnega gabra uvrščamo v zvezo Ostryo-Carpinion orientalis.

The Ostryo–Quercetum is a zonal forest community of the submediterranean region of Slovenia and is found on various aspects and slopes on calcareous bedrock. The soils consist of rendzic Leptosols. The climate is submediterranean, the annual rainfall is 1,250 mm, and the average annual temperature is 12^o C.

Diagnostic combination of plant species
Tree layer: Ostrya carpinifolia, Quercus pubescens, Fraxinus ornus.
Shrub layer: Cornus mas, Crataegus monogyna, Fraxinus ornus, Juniperus communis, Ostrya carpinifolia, Quercus pubescens.
Herb layer: Asparagus tenuifolius, Brachypodium ruprestre, Dorycnium herbaceum, Sesleria autumnalis.
Moss layer: Hypnum cupressiforme.

The forest stands take various forms but are primarily mixed stands of coppice and seed source trees. The tree layer is normally high, between six and fifteen meters, and covers between 80% and 90% of the surface. Both the shrub and herb layers are well developed.

The Ostryo–Quercetum pubescentis is not important from the point of view of acquiring wood. Above all, it serves a protective role since it safeguards the area against the rigours of the weather and the soil against erosion. After World War II, many meadows were abandoned. Today they have been gradually overgrown by the association Ostryo–Quercetum.

The Ostryo carpinifoliae–Quercetum pubescentis is classified in the alliance Ostryo–Carpinion orientalis.

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