Združba doba in lasastega beluša je ekstraconalno razširjena v submediteranskem fitogeografskem območju. Uspeva v širšem območju gozdov navadnega gabra, na rastiščih z visoko talno vodo, ki so občasno poplavljena. Prevladujejo psevdooglejena in oglejena tla. Temperaturne razmere so ugodne, srednja letna temperatura znaša okoli 12° C, zime so mile, skoraj brez snega. Padavine so relativno visoke – od 1200 do 1750 mm letno, z izrazitim poletnim minimumom.

Diagnostična kombinacija rastlinskih vrst
Drevesna plast: dob (Quercus robur), poljski jesen (Ulmus minor), ostroplodni jesen (Fraxinus oxycarpa), navadni gaber (Carpinus betulus).
Grmovna plast: Acer campestre, Cornus sanguinea, Corylus avellana, Crataegus laevigata, C. monogyna, Euonymus europaea, Hedera helix, Ligustrum vulgare, Lonicera caprifolium, Pyrus pyraster, Rosa arvensis, Rubus caesius, Viburnum lantana, V. opulus.
Zeliščna plast: Aegopodium podagrania, Ajuga reptans, Asparagus tenuifolius, Carex pendula, C. remota, C. sylvatica, Euphorbia amygdaloides, E. dulcis, Lamium orvala, Lysimachia nummularia, Primula vulgaris, Pulmonaria officinalis, Ruscus aculeatus, Vinca minor, Viola riviniana.

Po golosekih se razvije drugotni gozd črne jelše (Alnetum glutinosae s. lat.).

Gozdovi doba in poljskega jesena so skupinsko raznodobni in dvoplastni. Zavzemajo majhne površine. Njihov gospodarski pomen je zanemarljiv.

Združbo doba in lasastega beluša uvrščamo v zvezo Erythronio-Carpinion.

The Asparago tenuifolii–Quercetum roboris is a zonal forest association appearing extrazonally in the submediterranean phytogeographical region. The association thrives in broader forest areas of the Ornithogalo pyrenaici–Carpinetum betuli on sites with a high underground water level. They are periodically flooded and grow on Planosol and Gleysol. The temperatures are favourable with a mean annual temperature of around 12° C. Winters are mild and almost without snow. The annual precipitation is relative high, ranging from 1,200 to 1,750 mm with summer minimum.

Diagnostic combination of plant species
Tree layer: Quercus robur, Ulmus minor, Fraxinus oxycarpa, Carpinus betulus.
Shrub layer: Acer campestre, Cornus sanguinea, Corylus avellana, Crataegus laevigata, C. monogyna, Euonymus europaea, Hedera helix, Ligustrum vulgare, Lonicera caprifolium, Pyrus pyraster, Rosa arvensis, Rubus caesius, Viburnum lantana, V. opulus.
Herb layer: Aegopodium podagrania, Ajuga reptans, Asparagus tenuifolius, Carex pendula, C. remota, C. sylvatica, Euphorbia amygdaloides, E. dulcis, Lamium orvala, Lysimachia nummularia, Primula vulgaris, Pulmonaria officinalis, Ruscus aculeatus, Vinca minor, Viola riviniana.

After trees have been felled, a secondary forest of alder trees (Alnetum glutinosae s. lat.) develops.

As a group, the forests are predominantly uneven-aged in two layers. They cover smaller areas, and their economic significance is negligible.

The Asparago tenuifolii–Quercetum roboris is classified in the alliance Erythronio–Carpinion.

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Lausi L. 1966: Zur Klimax-Frage der friaulischen Ebene. Mitt. Ostalpin.-dinar. Pflanzensoziol. Arbeitsgem. 7: 41–46.
Marinček L. 1994: Zur Nomenklatur der Hainbuchenwälder des Erythronio-Carpinion. V: I. Trinjastić (ur.) Simpozij – Pevalek, Flora i vegetacija Hrvatske, Šumarski fakultet Sveučilišta u Zagrebu, Hrvatske šume, s. 57–62, Zagreb.
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 s.