Vegetation Science Group

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

Vegetation of the Czech Republic

Association VAA01
Lemnetum trisulcae den Hartog 1963

Lemnetum trisulcae

Photo on botanickafotogalerie.cz

This association is formed of species-poor to monospecific stands of Lemna trisulca, a submerged plant freely floating below the water surface. It occurs in mesotrophic to eutrophic still water bodies, especially in oxbows and alluvial pools with clear water. It avoids water bodies with deep layers of organic silt on the bottom. In the Czech Republic it occurs mainly in lowlands and colline areas, with a remarkable concentration of localities in the river floodplains.

Orig. (den Hartog 1963): Lemnetum trisulcae ass. nov.

Syn.: Lemnetum trisulcae Kehlhofer 1915 (§ 2b, nomen nudum), Lemna trisulca-Gesellschaft Knapp et Stoffers 1962 (§ 3c)

Diagnostic species: Lemna minor, L. trisulca

Constant species: Lemna minor, L. trisulca

Dominant species: Lemna minor, L. trisulca

Formal definition: Lemna trisulca cover > 50 % NOT Batrachium aquatile s. l. cover > 25 % NOT Batrachium rionii cover > 25 % NOT Berula erecta cover > 25 % NOT Bidens cernua cover > 25 % NOT Ceratophyllum demersum cover > 25 % NOT Glyceria maxima cover > 25 % NOT Hottonia palustris cover > 25 % NOT Nuphar lutea cover > 25 % NOT Phragmites australis cover > 25 % NOT Potamogeton trichoides cover > 25 % NOT Riccia fluitans cover > 25 % NOT Riccia rhenana cover > 25 % NOT Ricciocarpos natans cover > 25 % NOT Sagittaria sagittifolia cover > 25 % NOT Salvinia natans cover > 25 % NOT Schoenoplectus lacustris cover > 25 % NOT Sparganium emersum cover > 25 % NOT Sparganium erectum cover > 25 % NOT Typha angustifolia cover > 25 % NOT Typha latifolia cover > 25 % NOT Utricularia australis cover > 25 % NOT Wolffia arrhiza cover > 25 %

Source: Šumberová K. (2011): VAA01 Lemnetum trisulcae den Hartog 1963. 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. 47-49.