Leaf key to the trees of the northern states and Canada and a botanical glossary. This book, "Leaf key to the trees of the northern states and Canada and a botanical glossary. No. 5", by Romeyn Beck Hough, is a replication of a book originally published before 1910. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.