The British National Vegetation Classification or NVC is a system of classifying natural habitat types in Great Britain according to the vegetation they contain.
Myriophyllum (watermilfoil) is a genus of about 69 species of freshwater aquatic plants, with a cosmopolitan distribution.
A plant community (sometimes "phytocoenosis" or "phytocenosis") is a collection or association of plant species within a designated geographical unit, which forms a relatively uniform patch, distinguishable from neighboring patches of different vegetation types.
Potamogeton perfoliatus (claspingleaf pondweed, perfoliate pondweed, redhead grass) is a perennial aquatic plant in the family Potamogetonaceae occurring in both standing and flowing freshwater habitats.
Ranunculus fluitans (the river water-crowfoot) is a species of buttercup.
Vegetation type or plant community refers to members of a group or aspect of plants that are often found growing in an area together (plant associates), or that share similar environmental conditions, characterized by the presence of one or more dominant species.