The relationship between species composition, coverage and distribution of epiphytic bryophytes and lichens on Cryptomeria japonica D. Don, and environmental conditions was studied in Kanto-Koshin district, Japan. Trees of C. japonica with a DBH greater than 60 cm were chosen as the subject of this study. The number of species and vegetation cover of epiphytic bryophytes and lichens in this district tended to be higher in the outskirts and lower in central parts. In the distribution patterns of major species, clear differences were confirmed. Three floristic composition types based upon differences of distribution patterns of these major species showed the distribution pattern to coincide with atmospheric environmental gradient. It suggests that both of precipitation and secondary air pollutants largely affect the growth condition of epiphytic bryophytes and lichens.

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Rhizoidal gemmae were first found in Archidium ohioense Schimp. ex C. Mull. from Japan. They are filamentous (0.5-1.5 mm long, 100-140μm wide), blackish-brown, sometimes hyaline at apices. The gemma cells are barrel shaped, 100-160μm long, rich in oil drops. Most cells have at their mid-section single small cells (Arts 1991 called them "initial cells"). Rhizoidal gemmae in Archidium ohioense are quite similar in size and shape to those in A. alternifolium (Arts 1990) and A. thalliferum (Stone 1985). These gemmae are similar to those on Campylopus (Arts, 1989) and Ditrichum (Matsui et al., 1985).

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