noun
formation; plant community classification
Technical term in botany for a major unit of vegetation classification, equivalent to a formation in phytosociology.
日本の植生は、気候に応じたいくつかの群系に区分される。
Japan's vegetation is divided into several formations according to climate.
この地域の群系は主に落葉広葉樹林である。
The formation in this region is mainly deciduous broad-leaved forest.