Flora list of wild vascular plants in and around Ogawa research site of Japan

Abstract

Ogawa Forest Reserve is a 6-ha study plot established in the Ogawa Beech Protected Forest located in the northern region of Ibaraki Prefecture, assigned for researching long-term forest ecology. Approximately 60 tree species and abundant herbaceous grow in the forest floor of this plot. Although the flora list of vascular plants was previously organized according to the old taxonomic system, detailed identification and compilation, including herbaceous plants, have not yet been conducted. Thus, we worked on re-identification of the herbarium specimens collected and retained to date and arranged the flora list following the APG system during 2021-2022. Furthermore, we carried out field surveys in and around the plot and organized a comprehensive flora list of vascular plants. As a result, we recorded 358 species of vascular plants that belong to 88 families and 219 genera. Additionally, we discovered several previously unknown phytogeographically significant species in the field survey.