Blockeel, T. L. 2018. Mt Tzena, an important site for bryophytes in Greece, with a remarkably disjunct population of the rich-fen moss Cinclidium stygium. — Herzogia 31: 37–47.

Sixty-five bryophytes are reported from the upper altitudinal zones of Mt Tzena, northern Greece. They include a remarkably disjunct population of the Boreal-montane moss Cinclidium stygium, which is characteristic of strongly calcium-rich or mineral-rich wetlands and has declined greatly in Central Europe. Four further species are reported for the first time in Greece: Andreaea rupestris, Barbilophozia sudetica, Mesoptychia bantriensis and Schistochilopsis opacifolia. The presence of Distichium inclinatum in Greece is confirmed.