Abstract
This study discusses the moss flora of Mt. Kosa-dake, which is situated at approximately 32°39' N latitude and 130°52' E longitude, in Kyushu, southern Japan. The area is a calcareous site and belongs to the warm-temperate zone (evergreen broad-leaved forest zone). Among approximately 500 specimens collected from 2000 to 2002, 119 species, 2 subspecies, and 4 varieties were recognized in 82 genera of 34 families. For each species, localities, altitude, substrata, specimen numbers, and floristic elements were given. The moss flora of Mt. Kosa-dake is characterized by the following features; the rich flora of the family Fissidentaceae (9 species and 3 varieties), Neckeraceae (9 species and 1 varieties), Thuidiaceae (12 species), and Hypnaceae (12 species), and the East Asian (77 species; 62%) and tropic (24 species; 19%) species.
