plant Was the endangered species *Toranoosuzukake* a rare plant associated with Hiraga Gennai?
*Platanthera japonica*, a perennial herb distributed mainly in western Japan, is designated as an endangered species by various prefectures, although it is not designated as such by the Ministry of the Environment. The reason for its endangered status is its extremely small population, but the exact cause of this low population size is not well understood.
