Epipactis helleborine
"Epipactis helleborine" var. "youngiana" was first discovered in southern Northumberland, close to Newcastle-upon-Tyne and along the valley of the River South Tyne; all the sites were associated with metal mining. Populations of similar orchids on bings (coal-mining spoil heaps) in the Central Belt of Scotland have also been assigned to the same taxon. Similar plants also occur on the sand dunes at Kenfig Burrows in South Wales, which have been polluted by the nearby Margam steelworks.