Gozd navadnega gabra in črnega teloha je conalna gozdna združba ravninskega in spodnjega dela gričevnatega dela predalpskega fitogeografskega območja v nadmorskih višinah od 300 do 450 metrov. Pojavlja se na različnih ekspozicijah, vendar je najpogostejša na prisojnih pobočjih, ki so mestoma zelo strma (do 35 ^o). Prevladuje humidno podnebje predalpskega sveta s svežimi poletji in hladnim zimskih obdobjem. Obdobje rasti traja od aprila do konca oktobra. Geološka podlaga so fluvioglacialni nanosi peska in grušča ter drobnozrnati konglomerati. Na njih so najpogosteje plitva do srednje globoka, zelo skeletna rjava pokarbonatna tla, ponekod pa se pojavljajo rendzine.

Diagnostična kombinacija rastlinskih vrst:
Drevesna plast: graden (Quercus petraea), navadna smreka (Picea abies), beli javor (Acer pseudoplatanus), veliki jesen (Fraxinus excelsior), lipovec (Tilia cordata), navadni gaber (Carpinus betulus), češnja (Prunus avium), maklen (Acer campestre).
Grmovna plast: Cornus sanguinea, Corylus avellana, Crataegus monogyna, Euonymus europaea, Ligustrum vulgare, Lonicera caprifolium, L. xylosteum, Rosa arvensis.
Zeliščna plast: Anemone nemorosa, A. trifolia, Aposeris foetida, Asarum europaeum, Brachypodium sylvaticum, Campanula trachelium, Colchicum autumnalis, Crocus napolitanus, Cyclamen purpurascens, Euphorbia dulcis, Fragaria vesca, Galanthus nivalis, Hacquetia epipactis, Helleburus odorus, Hepatica nobilis, Melica nutans, Polygonatum multiflorum, Primula vulgaris, Pulmonaria officinalis, Salvia glutinosa, Symphytum tuberosum, Vinca minor, Viola reichenbachiana.

Slovenski predalpski svet je stara kulturna krajina. Večina gozdov je bila izkrčena za kmetijske in urbane površine. Gozdovi navadnega gabra so se ohranili le na mestih, ki niso bila primerna za kmetijsko rabo. Fragmentarno ohranjeni gozdovi so slabe kakovosti, večinoma degradirani panjevci.

Gozdovi navadnega gabra in črnega teloha so za pridobivanje lesne mase manjšega lesno-proizvodnega pomena. Po naših spoznanjih so gozdovi gabra in črnega teloha potencialnonaravna združba nižjih predelov predalpskega območja. To spoznanje se lahko s pridom uporablja pri optimalni rabi prostora, posebno v zvezi z njegovo ozelenitvijo.

Združbo navadnega gabra in črnega teloha uvrščamo v zvezo Erythronio-Carpinion.

The Helleboro nigri–Carpinetum betuli is a zonal forest association of the plains and lower hilly parts of the subalpine phytogeographical area located at an altitude of 300 to 450 meters. It appears in all aspects although it prefers sunny slopes which are very steep in places (up to 35^o). The humid climate of the subalpine region with fresh summers and cold winters predominates. The growth period lasts from April to the end of October. The geological layer consists of fluvioglacial sediments of sand and gravel and sand conglomerates. They are most frequently covered by shallow to medium deep, skeletal chromic Cambisol together with rendzic Leptosols.

Diagnostic combination of plant species
Tree layer: Quercus petraea, Picea abies, Acer pseudoplatanus, Fraxinus excelsior, Tilia cordata, Carpinus betulus, Prunus avium, Acer campestre.
Shrub layer: Cornus sanguinea, Corylus avellana, Crataegus monogyna, Euonymus europaea, Ligustrum vulgare, Lonicera caprifolium, L. xylosteum, Rosa arvensis.
Herb layer: Anemone nemorosa, A. trifolia, Aposeris foetida, Asarum europaeum, Brachypodium sylvaticum, Campanula trachelium, Colchicum autumnalis, Crocus napolitanus, Cyclamen purpurascens, Euphorbia dulcis, Fragaria vesca, Galanthus nivalis, Hacquetia epipactis, Helleburus odorus, Hepatica nobilis, Melica nutans, Polygonatum multiflorum, Primula vulgaris, Pulmonaria officinalis, Salvia glutinosa, Symphytum tuberosum, Vinca minor, Viola reichenbachiana.

Slovenia’s prealpine region is an old cultural landscape. The majority of forests were felled for farming and urban areas. The hornbeam forests were preserved only in places that were not suitable for agricultural purposes. The preserved fragmented forests are of inferior quality and most frequently are degraded coppiced forests.

The forests of the Helleboro nigrae–Carpinetum betuli are of no major significance relative to the acquisition of standing volume. Upon our knowledge, are the forests of the Helleboro nigri–Carpinetum betuli a potential natural association of lower areas of the prealpine region. This knowledge can be well used for optimal land use, in particular in connection with the planting of trees.

The Helleboro nigri–Carpinetum betuli is classified in the alliance Erythronio–Carpinion.

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Wraber M. 1969: Über die Verbreitung, Ökologie und systematische Gliederung der Eichen-Hainbuchenwälder in Slowenien. Feddes Rep. 79: 373–389, Berlin.
Marinček L. 1979: Der voralpine Wald der Hainbuche in Slowenien (Carpinetum praealpinum ass. nova). Phytocoenologia 6: 424–433.
Marinček L. & A. Čarni 2000: Die Unterverbände der Hainbuchenwälder der Verbandes Erythronio–Carpinion betuli (Horvat 1938) Marinček in Walnöfer, Mucina et Grass 1993. Scopolia 45, 20 p.