Vegetation Science Group

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

Vegetation of the Czech Republic

Association MCG05
Caricetum diandrae Jonas 1933

Caricetum diandrae

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This marsh type is dominated by Carex diandra, and often contains Menyanthes trifoliata and Potentilla palustris. It occupies fishpond littoral zones and depressions in mires with water slightly inundating the soil surface over most of the growing season. Soils are characterized by their high carbon content and extremely low concentration of nutrients compared to the other associations of the alliance Magno-Caricion elatae. In the Czech Republic this association is very rare; it has probably disappeared at some sites from where there are historical records.

Orig. (Jonas 1933): Caricetum diandrae (= Caricetum teretiusculae)

Syn.: Carex diandra-„kärr” Almquist 1929 (§ 3c)

Diagnostic species: Carex acuta, C. diandra, C. elata. Equisetum fluviatile. Eriophorum latifolium. Lythrum salicaria. Pedicularis palustris. Peucedanum palustre. Ranunculus flammula. Veronica scutellata

Constant species: Caltha palustris. Carex acuta, C. diandra, Equisetum fluviatile. Eriophorum latifolium. Galium palustre agg., Lycopus europaeus, Lythrum salicaria, Peucedanum palustre. Phragmites australis. Ranunculus flammula

Dominant species: Carex diandra, Equisetum fluviatile, Lysimachia thyrsiflora, Menyanthes trifoliata, Utricularia minor

Formal definition: Carex diandra cover > 5 % AND (Group Carex acuta OR Group Lysimachia vulgaris) NOT Calliergonella cuspidata cover > 5 % NOT Hamatocaulis vernicosus cover > 5 % NOT Sphagnum sp. cover > 5 %

Source: Hájková P. (2011): MCG05 Caricetum diandrae Jonas 1933. In: Chytrý M. (ed.), Vegetace České republiky. 3. Vodní a mokřadní vegetace [Vegetation of the Czech Republic 3. Aquatic and wetland vegetation]. Academia, Praha, pp. 538-541.