Vegetation of the Czech Republic
Potametum graminei Lang 1967
This vegetation type is dominated by Potamogeton gramineus, which has both broad leaves floating on the water surface and narrow submerged leaves. In some stands natant leaves can be absent, and in such cases the plants are entirely submerged. This association is typical of shallow mesotrophic water bodies with a mineral bottom, mainly fishponds but also flooded depressions and alluvial pools. It disappears in later successional stages characterized by mud accumulation. This is a rare vegetation type in the Czech Republic.
Orig. (Lang 1967): Potametum graminei (W. Koch 1926) Passarge 1964
Syn.: Ass.-Gr. Potametum graminei (Koch 1926) Passarge 1964 (§ 3d), Potametum panormitano-graminei sensu auct. non Koch 1926 (pseudonym)
Diagnostic species: Potamogeton gramineus, P. pusillus agg.
Constant species: Potamogeton gramineus
Dominant species: Alisma gramineum, Potamogeton gramineus, P. pectinatus
Formal definition: Potamogeton gramineus cover > 25 % NOT Phragmites australis cover > 25 % NOT Typha angustifolia cover > 25 %
Source: Šumberová K. (2011): VBB02 Potametum graminei Lang 1967. 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. 138-141.