Vegetation of the Czech Republic
Leersietum oryzoidis Eggler 1933
This is a wet grassland community dominated by Leersia oryzoides. It occurs in the littoral zones and on exposed bottoms of shallow water bodies such as fishponds and fish storage ponds, as well as in intermittently flooded habitats in floodplains. It does not tolerate substrate desiccation, or long-term flooding in a growing season by water deeper than 5 cm. Water is mesotrophic to eutrophic. This thermophilous community occurs mainly in lowlands and warm colline areas.
Orig. (Eggler 1933): Leersietum oryzoidis
Syn.: Leersietum oryzoidis Krause in Tüxen 1955, Leersio-Bidentetum Poli et J. Tüxen 1960
Diagnostic species: Bidens frondosa, Leersia oryzoides
Constant species: Bidens frondosa, Leersia oryzoides, Persicaria hydropiper
Dominant species: Leersia oryzoides
Formal definition: Leersia oryzoides cover > 25 % NOT Cicuta virosa cover > 25 %
Source: Šumberová K. (2011): MCE05 Leersietum oryzoidis Eggler 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. 511-514.