Neottia ovata (eggleaf twayblade or Common Twayblade) is a terrestrial orchid widespread across much of Europe, including the British Isles, as well as Siberia, Central Asia, Southwest Asia and the Himalayas. It has been introduced into Ontario, Canada, where it has been called the Eggleaf 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 same group, and the two genera have been combined.