Communities of Berteroa incana in Europe and their geographical differentiation

Two geographical races have been established within the Berteroetum incanae in Europe. The Galium mollugo race of the Berteroetum incanae is characteristic of the western part of the distribution area of the association whereas the releves from the eastern part of Europe are classified as the Acosta rhenana race of the Berteroetum incanae. Adventitious Berteroetum incanae from the Netherlands has been shown to be a separate subunit within the Galium mollugo race of the Berteroetum incanae.