[Wikipedia] Genus Name Change: Neottia banksiana is a species of orchid known by the common name northwestern twayblade. It was formerly placed in the genus Listera, but molecular phylogenetic studies have shown that Neottia nidus-avis, the bird's-nest orchid, evolved within the clade formerly containing only Listera species,[2] so all species of Listera have been formally moved to Neottia, the older genus.[3] Some continue to refer to this species by its previous genus; older scientific names include Listera banksiana and Listera caurina. (link added by Mary Ann Machi)