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''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.〔 (as ''Listera ovata'')〕 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,〔, p. 864〕 and the two genera have been combined. ''Neottia ovata'' grows in a variety of habitats: woods, meadows, dune-slacks and moorland. The flowering stems are typically tall, occasionally up to . There are two large opposite basal leaves (hence the common name), long. A variable number of flowers is borne on the stems, usually more than 15 but less than 100. The flowers are small and yellowish-green in colour. The sepals and the two side petals form a fairly open hood, 5–6 mm (0.2 in) long; the labellum or lip (the central petal) is long and is divided at the end into two lobes.〔 == Pollination == The flower of ''Neottia ovata'' is well accessible for a wide range of insects. It is above all pollinated by parasitic wasps, sawflies and beetles. The pollinia lie free on top of the gutter-shaped rostellum, an organ that is filled with viscid fluid. When an insect touches the sensitive tip of the rostellum, the viscid fluid is ejected and glues the pollinia to the visitor's body. Fruit set is quite high. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Neottia ovata」の詳細全文を読む スポンサード リンク
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