Archibald Menzies

Countries visited: Mostly America, New Zealand, Tahiti, Hawaii, Chile

David Douglas

Countries visited: USA, Portugal, Hawaii, Galapagos

David Lyall

Countries visited: Antarctic Regions, New Zealand, Artic Regions, Canada and USA

Francis Masson

Countries visited: South Africa, Spain, Portugal, Tenerife, Azores, West Indies, Canada, USA

George Don

Countries visited: Madeira, then Tenerife, Cape Verde, Gambia, Guinea, Sierra Leone, Brazil, Cuba, USA

George Forrest

Countries visited: China, Burma, Tibet

George Sherriff

Countries visited: India, Tibet, Bhutan

James Drummond

Countries visited: Ireland and Australia

Robert Fortune

Countries visited: Mostly China, Indonesia, Japan, Hong Kong, Philippines

Thomas Drummond

Countries visited: N. America, Canada

Thomas Thomson

Countries visited: Afghanistan, India, Tibet

William Forsyth

William Forsyth was one of the founder members of the Royal Horticulturual Society