Abstract
In the present paper the author proposed a new subgenus of Lophozia Dum., Hattoriella, including a single species, L. diversiloba Hatt., and the relationships to other subgenera are discussed. Key to those subgenera may be as follows: Underleaves present; cortical cells of stem with distinctly thickened walls; oil-bodies rather few in number and large in size; capsule wall composed of 3-5 layers; gemmae present; paraphyllia usually not present in male inflorescence …Orthocaulis and Leiocolea Underleaves not present; cortical cells of stem not so thickened; oil bodies few in number and large in size; capsule wall composed of 2 layers of anisodiametric cells; gemmae not present; paraphyllia present in male inflorescence …Hattoriella Underleaves not present; cortical cells of stem not thickened; oil-bodies many in number and small in size; capsule wall composed of 3-5 or 2 (in Isopaches, isodiametric cells) layers; gemmae present; paraphyllia not present in male inflorescence……Dilophozia, Isopaches and Massula.

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