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Map of Central Europe showing the distribution of Diphasiastrum taxa identified; a, D. alpinum; c, D. complanatum; i, D. × issleri; o, D. × oellgaardii; t, D. tristachyum; z, D. × zeilleri. Code numbers for the regions: 1Denmark, 2Harz Mountains, 3Hessischer Odenwald, 4Vosges Mountains, 5Black Forest, 6Bavarian Forest, 7Oberpfälzer Wald, 8Bohemian Forest, 9South Tyrol.
