The Namib sand dunes are an extraordinary desert ecosystem and characterized by low rainfall and high sand mobility. The dune sea is composed mostly of linear dunes running predominately in N-S direction. In the presented study the vegetation composition and distribution were investigated along a climatic W-E gradient in the surrounding area of Gobabeb. In the investigated sites 8 species could be found, including: the grasses Stipagrostis sabulicola (Poaceae) S. lutescens, S. gonathostachys, S. seelya, Centropodium glaucum (Poaceae), Cladoraphis spinosa and the succulent Trianthema hereroensis T. triquetra (Aizoaceae). The number of species and density increased towards east with increasing of sand stability. The ions content were measured in the dominant species. A high ions accumulation could be found in the succulent Trianthema hereroensis. This sodium accumulation is typical for the family of Aizoaceae.