 Several scarce and notable species occur, including round-headed rampion ("Phyteuma tenerum"), bastard-toadflax ("Thesium humifusum"), fly orchid ("Ophrys insectifera"), fragrant orchid ("Gymnadenia conopsea"), lesser butterfly orchid ("Platanthera bifolia"), frog orchid ("Coeloglossum viride"), musk orchid ("Herminium monorchis") and – unusually for a downland site – marsh helleborine ("Epipactis palustris").A Marconi Imperial Wireless Chain receiving station was built on the south-east slopes of the hill in 1913, as the receiving station for the Leafield transmission station in Oxfordshire.The contract for the Imperial Chain was terminated by the Post Office after the outbreak of war and the station was not used for its original function when Leafield was resurrected after the War.