AbstractThe results of a comparative study ofPohlia muyldermansiifrom Continental Europe and the British Isles are presented. Two varieties are recognized, var.muyldermansiifrom Belgium and the Netherlands and var.pseudomuyldermansiivar. nov. from Great Britain, Ireland, Austria and Switzerland.P. camptotrachelais reported from Belgium and differences between this species andP. muyldermansiidiscussed.