Communities of the margins of lakes, rivers and brooks dominated by Typha latifolia, Typha angustifolia, Typha domingensis, Typha laxmannii, Typha elephantina formations, usually extremely species-poor and sometimes almost pure, tolerant of extended periods of dryness, varying conditions of salinity, and of pollution. Although Typha species are dominant, other common species such as Acorus calamus, Equisetum fluviatile, Phragmites australis, Glyceria maxima and Schoenoplectus lacustris and alliance Phragmition communis may also occur.