1 folder containing correspondence, map, 3 photographs and report outlining the discovery of a hybrid orchid, Rhizanthera chevallierana, on Ben Lawers by David Mardon in 1979. The folder was compiled after a search for photographs of the plant taken by Mardon in 1984. Contents include, email correspondence between Clive Stace, Adele Smith and Lorna Mitchell outlining the search for photographs and compilation of the folder (2013), report and notes compiled by David K. Mardon in 1984 outlining his find, map showing where he found it, correpondence between Douglas McKean, [Paddy Woods], R.H. Roberts and David Mardon regarding the identification of the orchid, and three photographs taken by Mardon.