Vegetation Science Group

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

Vegetation of the Czech Republic

Association MBA06
Polygonetum hydropiperis Passarge 1965

Polygonetum hydropiperis

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This vegetation type is usually dominated by Persicaria hydropiper or the neophyte Bidens frondosa. It occurs on the banks of fishponds, water reservoirs, rivers and brooks, bottoms of fish storage ponds, seasonally flooded pools in river floodplains, ditches, channels, wet arable fields, and puddles on forest paths and clearings. Water retention is not persistent and soils tend to dry out quickly. It is poorer in nutrients than in other associations of the alliance Bidention tripartitae that are confined to muddy substrates. This vegetation type is common from lowland to submontane areas across the Czech Republic.

Orig. (Passarge 1965): Polygonetum hydropiperis

Syn.: Polygono hydropiperis-Bidentetum (Koch 1926) Lohmeyer in Tüxen 1950 p. p. (§ 2b, nomen nudum), Bidenti-Polygonetum mitis Tüxen 1979

Diagnostic species: Bidens frondosa. Myosoton aquaticum. Persicaria hydropiper

Constant species: Bidens frondosa. Lycopus europaeus, Persicaria hydropiper, Phalaris arundinacea

Dominant species: Bidens frondosa, B. tripartita, Persicaria hydropiper

Formal definition: Group Bidens frondosa AND (Bidens frondosa cover > 50 % OR Bidens tripartita cover > 50 % OR Persicaria.hydropiper cover > 50 % OR Persicaria mitis cover > 50 %) NOT Group Chenopodium glaucum NOT Group Ranunculus sceleratus NOT Urtica dioica cover > 25 %

Source: Šumberová K. (2011): MBA06 Polygonetum hydropiperis Passarge 1965. 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. 368-371.