New and Misunderstood Species of Japanese Pannaria (Lichenes)

Abstract

Japanese species of the lichen genus Pannaria were revised. A new species in the P. rubiginosa group, P. asahinae P.M.Jørg. was described. P. globuligera Hue and P. insularis P.M.Jørg. & Kashiw., sp. nov. in the P. lurida group were recognized. A key is given to the sorediate/isidiate taxa recognized at present. Only material of P. lurida from meridional Japan belongs to subsp. lurida, whereas that from Hokkaido and northern Honshu belongs to subsp. russellii (Tuck.) P.M.Jørg., though often containing pannarin. P. tavaresii P.M.Jørg. is recorded as new to Japan. The term gymnidium is introduced for the special ecorticate lobules found on P. globuligera and several other species of the Pannariaceae. All names are typified when necessary.