Gymnadenia conopsea
Denge Wood is particularly notable for the range of orchids that it supports. twayblade ("Neottia ovata"), common spotted orchid ("Dactylorhiza fuchsii"), pyramidal orchid ("Anacamptis pyramidalis"), greater butterfly orchid ("Platanthera chlorantha"), man orchid ("Aceras anthropophorum") and fragrant orchid ("Gymnadenia conopsea") occur in the scrubland and chalk grassland. The early purple orchid ("Orchis mascula"), fly orchid ("Ophrys insectifera"), lesser butterfly orchid ("Platanthera bifolia") and bird's nest orchid ("Neottia nidus-avis") can be found in woodland areas whilst there is also a large population of the rare lady orchid ("Orchis purpurea").