A panel of Foresters (2pm Saturday 16 May, Summerhall, Edinburgh), perhaps a Glossary might be in order (thanks to Robert Macfarlane and his new book Landmarks for the idea and the resources).
Forestry Commission Research Glossary. (Page to a letter, i.e. not particularly good for browsing).
Royal Forestry Society Glossary. (Some terms and some links – full glossary available to members, but one also finds a link to an article on Forestry and Painting by Andy Moffat arguing that specific paintings of forests contribute to foresters’ understanding).
Forests and Chases in England and Wales, c. 1000 to c. 1850; A Glossary of Terms and Definitions. (Obviously it’s England and Wales not Scotland, but an interesting historical resource).