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These tables summarise habitat requirements and management features of characteristic waterway and wetland plants. Species are common and widespread unless otherwise noted, and most are suitable for introduction to new aquatic or wetland areas within the limits noted. A few species have been included which are relatively rare or more typical of other habitats, but have some management importance in aquatic environments. Plants are listed alphabetically by common name in five tables, each table corresponding to a successional zone (see waterway and wetland ecology). Divisions between zones are often blurred, and species placed in one table may occur in adjacent zones. Sometimes plants are weakened or stunted or appear quite different in these conditions. For example, certain typically emergent plants may remain submerged in flowing waters, where they do not flower, and produce soft, strap-like leaves rather than stiff leaves. True aquatic species cannot survive even short-term drying, and remain under or on the surface except when they produce emergent flower spikes. Nomenclature follows that used in the Excursion Flora of the British Isles (Clapham, A R, Tutin, T G and Warburg, E F; 1968). An asterisk before the common name indicates a non-native, introduced species, although in most cases these are naturalised. The abbreviations 'N', 'S', 'SE' etc refer to general regions of Britain, but distributions cannot be indicated precisely in the limited space. NOTES, TABLES 1-5
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