Gymnadenia conopsea
In the undisturbed part of Raisby Hill primary magnesian limestone grassland is the main vegetation type. Blue moor-grass, "Sesleria albicans", is abundant, and there is a rich assemblage of species characteristic of calcareous soils, such as quaking grass, "Briza media", meadow oat grass, "Avenula pratensis", glaucous sedge, "Carex flacca", and fragrant orchid, "Gymnadenia conopsea".