The lowest level of the supralittoral, just above the normal tide limit, where drift material accumulates and the shingle may be rich in nitrogenous organic matter. Vegetation, if present at all, is very open and composed of annuals or, particularly by the Mediterranean, especially the east Mediterranean, of annuals and perennials, occupying accumulations of drift material and gravels rich in nitrogenous organic matter; characteristic are Cakile maritima, Salsola kali, Atriplex spp., Polygonum spp., Euphorbia peplis, Mertensia maritima, and, particularly in Mediterranean formations, Glaucium flavum, Matthiola sinuata, Matthiola tricuspidata, Euphorbia paralias, Eryngium maritimum.
Very open, low formations of annuals and perennials of Mediterranean, thermo-Atlantic and Black Sea gravel and shingle beaches, occupying accumulations of drift material, sandy gravels and gravels rich in nitrogenous organic matter; characteristic are Cakile maritima ssp. aegyptiaca, Cakile maritima ssp. euxina, Enarthrocarpus arcuatus, Matthiola sinuata, Matthiola tricuspidata, Salsola kali, Atriplex spp., Polygonum spp., Euphorbia peplis, Euphorbia paralias, Glaucium flavum, Eryngium maritimum.