ln vivo regeneration of macrophytes from wetlands of the Mediterranean Morocco. The macrophytes are used in constructed wetlands for wastewater treatment. Culture assays of macrophytes in greenhouse or in wastewater-treatment basins have been led in aquatic, semi-aquatic or terrestrial macrophytes (Lemna gibba, Phragmites australis, Sparganium erectum, Typha angustifolia, Arundo donax, Populus euphratica, Salix purpurea, Tamarix gallica). Evapotranspiration of these macrophytes has been assessed.