Abstract
Phytosociological investigations of Aster kantoensis community were carried out along the main stream of Sagamigawa River within Kanagawa Prefecture. The data were treated as Kummerovio-Asteretum kantoensis Miyawaki et Okuda 1972, and existing condition was recorded based on its component species. Further, with reported data along the Sagamigawa River, ecological significance of its under units was examined based on life-form spectrum, average number of species and differential species thereof. The results of this study revealed that subassociation with Artemisia capillaris is a developed succession progress, as reported by Okuda (1978), and variant with Bromus japonicum can be positioned as a spring phase of its seasonal succession.
