Picea glehnii forest was found by ISHIZUKA (1961) on Mt. Hayachine located in the central Iwate Prefecture as the southernmost one in Japan, as far as we know. The tree species composition and their natural-regeneration in this forest were investigated in the fall of 1976. The Picea glehnii trees are distributed in the mixed conifer forest and partially grow on serpentine rock adjacent to the Aion-zawa ravine. This forest is composed of several conifers such as Picea glehnii, Pinus parviflora var. pentaphylla, Tsuga diversifolia, Thujopsis dolabrata var. hondae and a few deciduous broad leaved trees. Picea glehnii is a dominant in this community above-mentioned. Judging from results obtained in connection with the natural-regenerated seedling being found around Picea glehnii stumps and on the bare ground, the authors can describe that these seedlings will grow up to the new young forest stand in future. It is not so clear why Picea glehnii has still survived in this area far from the center of its distribution, however the main cause for such a phenomenon primarily depends upon the fact that Picea glehnii community is apt to grow on a serpentine zone, and Picea glehnii has generally a long life.
