Greater Butterfly Orchid
Le Trou Du Diable, Nismes. Viroinval, Belgium (June, 2016).
The flowers are greenish-white, scented of vanilla, with spreading sepals and petals. The lip of the flower is long, narrow and undivided. The flower has a very long spur. The flowers form a rather loose spike. The anthers are broad, hence the name Platathera. The pollen masses diverge to touch both sides of the pollinating insect.

"Platanthera chlorantha", commonly known as greater butterfly-orchid, is a species of orchid in the genus "Platanthera". It can be found throughout Europe and Morocco. The name "Platanthera" is derived from Greek, meaning "broad anthers", while the species name, "chlorantha", means "green-flowered".