The lichen genera Collemopsidium Nyl. and Verrucaria Schrader from the Galician seashores (NW Spain)
Paz-Bermúdez, Graciela Lópezde Silanes
The morphological variability of marine and maritime lichens of the genera Verrucaria (11 species) and Collemopsidium (2 species) found on the coast of Galicia (NW Spain) is studied and the conflicting information encountered in the literature discussed. A dichotomous, but multi-entry, identification key for the taxa is included, which takes this variability into account.