The genus Microcampylopus agrees with the genus Campylopodium in general character. As already remarked by Dixon, it may be a question, whether Microcampylopus is worthy of full generic rank. According to Fleischer, Dixon, and Brotherus, etc. however, the important discrepancy between the two genera is in the characteristics of capsule. The capsules of Campylopodium have several stomatae on capsule-neck, whereas in Microcampylopus they lack stomatae. Differences between the two genera seem also to exist in the characteristics of spores. In Eastern Asia, Campylopodium euphorocladum has hitherto been recorded from Indo-Malay, the Philippines, Formosa, and Southern Japan. A specimen from Java agrees with Fleischer's description, especially in the presence of stomatae on capsule-neck and the minutely papillose spores. In the characteristics of spores, the specimen from Isl. Sakurajima (where it is found growing on volcanic rock), for the present the only locality in Japan, agrees well with the foregoing. Javanese specimen, but it bears stomatae rarely. While, the specimens from Mt. Posuey, Luzon, assigned by Brotherus to this species, and that from Mt. Taitum, Formosa by Cardot as well lack stomatae entirely. Furthermore, these specimens have golden yellow spores bearing large pellucid papillae on the suaface. Such a characteristic of spores was observed by Fleischer and Dixon on those of Microcampylopus subnanus. Therefore, the specimens from Mt. Posuey and Formosa may be not be referred to Campylopodium euphorocladum.