Two species of the genus Philonotis Brid. described from subantarctic Îles Crozet are taxonomically assessed and some details of their gametophytes are illustrated. Philonotis angustifoliia Kaal. is conspecific with Ph. tenuis Taylor, and Ph. tenella Kaal. is identical to Ph. polymorpha (Müll.Hal.) Kindb. These taxonomic conclusions confirm the occurrence of Ph. tenuis in this subantarctic archipelago, whereas Ph. polymorpha is a new record for Îles Crozet and this discovery completes its circumsubantarctic range.