Journal kept by David Douglas during his travels in North America 1823-1827, together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834. Published under the direction of the Royal Horticultural Society - Douglas, David,; Royal Horticultural Society (Great Britain) (W. Wesley & Son, 1914)
Keywords: Botany; Description and travel; North America; Northwestern States; Oak; Pine