Vegetation of the Czech Republic
Bidentetum tripartitae Miljan 1933
This vegetation type is dominated by Bidens tripartita or Persicaria lapathifolia, which often form dense species-poor stands up to 150 cm tall. It occurs on exposed fishpond bottoms, along the shores of water reservoirs, in fish storage ponds, on river banks and wet arable land. Most often substrate is loamy to clayey mud, in places with an admixture of sand, and typically also with high nutrient content. However, this vegetation may also develop on nutrient-poor sites, where stands tend to be shorter. It tolerates substrate desiccation, therefore it also occurs in regions with warm and dry summers. In the Czech Republic it is most frequent in fishpond areas, but it is also common elsewhere at low to mid-altitudes.
Orig. (Miljan 1933): Bidentetum tripartiti
Syn.: Bidentetum tripartitae Koch 1926 (§ 36, nomen ambiguum), Bidenti tripartitae-Polygonetum lapathifolii Klika 1935, Polygono hydropiperis-Bidentetum (Koch 1926) Lohmeyer in Tüxen 1950 p. p.
Diagnostic species: Alopecurus aequalis. Bidens tripartita. Persicaria lapathifolia. Rorippa palustris
Constant species: Alopecurus aequalis. Bidens tripartita. Persicaria hydropiper. P. lapathifolia. Rorippa palustris
Dominant species: Bidens tripartita, Carex bohemica, Persicaria lapathifolia
Formal definition: (Bidens tripartita cover > 50 % OR Persicaria lapathifolia cover > 50 %) NOT Group Bidens frondosa NOT Group Calystegia sepium NOT Group Chenopodium glaucum NOT Group Cirsium arvense NOT Group Lolium perenne NOT Group Stellaria media NOT Bidens frondosa cover > 25 % NOT Bidens radiata cover > 50 % NOT Chenopodium rubrum cover > 25 % NOT Glyceria maxima cover > 25 % NOT Oenanthe aquatica cover > 50 % NOT Rumex maritimus cover > 25 %
Source: Šumberová K. (2011): MBA02 Bidentetum tripartitae Miljan 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. 355-359.