Vegetation Science Group

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

Vegetation of the Czech Republic

Alliance MBA
Bidention tripartitae Nordhagen ex Klika et Hadač 1944

The alliance Bidention tripartitae includes stands of annual wetland species belonging to the genera Bidens, Persicaria, Ranunculus, Rumex and Xanthium. These species are usually 50–150 cm tall and produce large amounts of biomass. They develop on wet, loamy to clayey, nutrient rich substrata. In some places, they replace pioneer vegetation of the class Isoëto-Nano-Juncetea during the course of succession, but often they are the first vegetation type colonizing recently exposed bare wet substrata, especially if they are very rich in nutrients or dry out quickly. This alliance is distributed across Eurasia and North America.

Orig. (Klika & Hadač 1944): Bidention tripartiti Nordhagen 1939–40

Syn.: Polygono-Chenopodion polyspermi Koch 1926 (§ 36, nomen ambiguum), Associationsgruppe Bidention tripartitae (Koch 1926) Nordhagen 1940 (§ 3d), Chenopodion fluviatile Tüxen in Poli et J. Tüxen 1960 p. p., Chenopodion rubri (Tüxen 1960) Hilbig et Jage 1972 p. p.

Diagnostic species: Alopecurus aequalis. Bidens cernua. B. radiata. B. tripartita. Carex bohemica. Chenopodium rubrum. Oenanthe aquatica. Persicaria hydropiper. P. lapathifolia. Ranunculus sceleratus. Rorippa palustris. Rumex maritimus

Constant species: Persicaria lapathifolia. Rorippa palustris. Rumex maritimus

Source: Šumberová K. (2011): MBA Bidention tripartitae Nordhagen ex Klika et Hadač 1944. 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. 349-351.