Vegetation Science Group

Department of Botany and Zoology | Faculty of Science | Masaryk University

Vegetation of the Czech Republic

Association LBA07
Fraxino pannonicae-Ulmetum glabrae Aszd 1935 corr. So 1963

Fraxino pannonicae-Ulmetum glabrae

Photo on botanickafotogalerie.cz

This floodplain forest is dominated by Fraxinus angustifolia or Quercus robur, with frequent occurrence of Acer campestre, Carpinus betulus, Ulmus laevis and U. minor in the subcanopy and Crataegus laevigata in the shrub layer. The herb layer has a distinctive synusia of vernal geophytes and in summer is dominated by nutrient-demanding hygrophilous forest species, with participation of some species of wetlands and mesic forests. It occurs in broad floodplains of lowland rivers in southern Moravia, within the geographical range of Fraxinus angustifolia. These sites are wetter than those of the association Ficario vernae-Ulmetum campestris: before rivers were dammed they were flooded every year for several days to several weeks. Many stands originated from former woodland pastures, which were conducive to oak regeneration; in the current closed-canopy forests oak is being continuously replaced by ash. Also, trees of mesic sites are spreading due to bank stabilisation associated with streamflow regulation on major rivers.

Orig. (Aszd 1935): Fraxineto-Ulmetum (Fraxinus pannonica = F. angustifolia, Ulmus glabra)

Diagnostic species: Acer campestre, A. negundo, Cornus sanguinea, Fraxinus angustifolia, Quercus robur, Rubus caesius, Tilia cordata, Ulmus laevis, U. minor; Aristolochia clematitis, Brachypodium sylvaticum, Cardamine impatiens, Carex remota, C. strigosa, C. sylvatica, Circaea lutetiana, Dactylis polygama, Festuca gigantea, Geum urbanum, Glechoma hederacea agg., Lamium maculatum, Lysimachia nummularia, Rumex sanguineus, Symphyotrichum novi-belgii agg., Torilis japonica, Viola reichenbachiana

Constant species: Acer campestre, Carpinus betulus, Cornus sanguinea, Fraxinus angustifolia, Quercus robur, Rubus caesius, Tilia cordata; Ajuga reptans, Brachypodium sylvaticum, Carex remota, C. sylvatica, Circaea lutetiana, Dactylis polygama, Deschampsia cespitosa, Festuca gigantea, Galium aparine, Geum urbanum, Glechoma hederacea agg., Impatiens parviflora, Lamium maculatum, Lapsana communis, Lysimachia nummularia, Rumex sanguineus, Symphytum officinale, Urtica dioica, Veronica chamaedrys agg. (V. chamaedrys s. str.), Viola reichenbachiana

Dominant species: Acer campestre, Carpinus betulus, Cornus sanguinea, Fraxinus angustifolia, Quercus robur, Rubus caesius, Tilia cordata; Allium ursinum, Brachypodium sylvaticum, Dactylis polygama, Deschampsia cespitosa, Galeobdolon luteum agg. (G. montanum), Galium odoratum, Glechoma hederacea agg., Lamium maculatum, Symphyotrichum novi-belgii agg., Urtica dioica

Formal definition: Fraxinus angustifolia cover > 5 % AND (Group Symphytum officinale OR Group Urtica dioica)

Source: Douda J. (2013): LBA07 Fraxino pannonicae-Ulmetum glabrae Aszd 1935 corr. So 1963. In: Chytr M. (ed.), Vegetace esk republiky. 4. Lesn a kovinn vegetace [Vegetation of the Czech Republic 4. Forest and shrub vegetation]. Academia, Praha, pp. 216-219.