Vegetation Science Group

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

Vegetation of the Czech Republic

Association VAA06
Lemno gibbae-Wolffietum arrhizae Slavnić 1956

Lemno gibbae-Wolffietum arrhizae

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This association includes stands with Wolffia arrhiza, a tiny lemnid species, which is usually accompanied by other lemnids. It occurs in alluvial pools, oxbows and channels in broad river floodplains, but it avoids artificial water bodies such as fishponds. Wolffia arrhiza is a thermophilous species occurring rarely in the floodplains of the lower Dyje and Morava rivers in southern Moravia.

Nomen inversum propositum

Orig. (Slavnić 1956): Wolffieto-Lemnetum gibbae ass. nova (Wolffia arrhiza)

Syn.: Wolffio-Lemnetum gibbae Bennema 1943 ms. p. p. (§ 1), Wolffietum arrhizae Miyawaki et J. Tüxen 1960

Diagnostic species: Ceratophyllum demersum. Lemna trisulca. Spirodela polyrhiza, Wolffia arrhiza

Constant species: Lemna minor. L. trisulca, Spirodela polyrhiza, Wolffia arrhiza

Dominant species: Lemna minor, L. trisulca, Spirodela polyrhiza, Wolffia arrhiza

Formal definition: Wolffia arrhiza cover > 25 % NOT Ceratophyllum demersum cover > 25 %

Source: Šumberová K. (2011): VAA06 Lemno gibbae-Wolffietum arrhizae Slavnić 1956. 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. 61-64.