The nationally rare late spider orchid is limited within the British Isles to chalk grassland between Folkestone and Wye. One of the two native British sites for the nationally rare monkey orchid is on the North Downs. The nationally scarce man orchid is not uncommon on chalk grassland on the Downs in Surrey and Kent. Other scarce plant species such as early gentian, dwarf milkwort and bedstraw broomrape also occur on chalk grassland in the North Downs.