抄録
Rhachithecium perpusillum (Thwaites & Mitt. in Mitt.) Broth. is added to the moss flora of Japan. The species is closely related to R. nipponicum (Toyama) Wijk & Margad., but has well developed peristome teeth. It was found on branches of Diospyros kaki, at about 600 m alt., Magome, Yamaguchi-mura, Nagano-ken, central Japan. Description (in Japanese) and illustrations of this species are given.
