Photo taken 28/07/18 at Ashridge.
I have seen this once or twice on my walks. It is a member of the Orchid family and flowers in August, most commonly in beech woods on clay soil overlaying chalk (such as areas of the Chiltern Hills).
Photo taken 28/07/18 at Ashridge.
Photo taken 28/07/18 at Ashridge.
Photo taken 30/08/08 near Whipsnade, Beds.
Photo taken 30/08/08 near Whipsnade, Beds.