Abstract
The relationships between climatic conditions and distribution of sporophytes are investigated for eleven mosses in Niigata Prefecture, central Japan. Although these mosses are widely distributed in the district, they infrequently produce sporophytes. Using the grid method, the occurrence of species in the grid is analyzed along with several climatic factors, such as Kira's Warmth Index, summer and winter precipitation and snow depth. The different frequencies of sporophyte occurrence in these species are considered to be controlled by various climatic factors and differences in the adaptational conditions for sporophyte production.
