Vegetation Science Group

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

Vegetation of the Czech Republic

Association LAA02
Carici elongatae-Alnetum glutinosae Txen 1931

Carici elongatae-Alnetum glutinosae

Photo on botanickafotogalerie.cz

This swamp forest is dominated by Alnus glutinosa, with Frangula alnus and Salix cinerea participating in a sparse shrub layer. The herb layer is characterized by a distinct pattern of hummocks and hollows, the former being usually covered by tussocks of Carex elongata, accompanied by mesophytic species, the latter supporting marsh species and in places even some aquatic plants. This association develops in mesotrophic to eutrophic habitats with significant accumulation of undecomposed organic matter. In spring the water table usually rises above the ground level. In the Czech Republic it occurs mainly on waterlogged sites near fishponds and in terrestrializing oxbows at lower and middle altitudes.

Orig. (Txen 1931): Cariceto elongatae-Alnetum glutinosae

Syn.: Carici elongatae-Alnetum glutinosae Koch 1926 ( 2b, nomen nudum), Carici elongatae-Alnetum glutinosae Schwickerath 1933, Hottonio-Alnetum Hueck ex Fukarek 1961

Diagnostic species: Alnus glutinosa, Salix cinerea; Calamagrostis canescens, Carex elongata, Dryopteris carthusiana, Galium palustre agg., Iris pseudacorus, Lycopus europaeus, Lysimachia thyrsiflora, L. vulgaris, Peucedanum palustre, Scutellaria galericulata, Solanum dulcamara, Thelypteris palustris

Constant species: Alnus glutinosa; Calamagrostis canescens, Caltha palustris, Carex elongata, Deschampsia cespitosa, Dryopteris carthusiana, Galium palustre agg., Impatiens noli-tangere, Iris pseudacorus, Lycopus europaeus, Lysimachia thyrsiflora, L. vulgaris, Myosotis palustris agg., Peucedanum palustre, Phalaris arundinacea, Scutellaria galericulata, Solanum dulcamara, Urtica dioica

Dominant species: Alnus glutinosa; Calamagrostis canescens, Carex acutiformis, C. elongata, Glyceria maxima, Phalaris arundinacea, Scirpus sylvaticus, Urtica dioica

Formal definition: Alnus glutinosa cover > 25 % AND (Group Carex elongata OR Group Iris pseudacorus) AND Group Lysimachia vulgaris NOT Group Carex panicea NOT Group Carex rostrata NOT Group Viola palustris NOT Molinia caerulea agg. cover > 15 %

Source: Douda J. (2013): LAA02 Carici elongatae-Alnetum glutinosae Txen 1931. 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. 171-174.