early century vintage natural history book, Trees w/ 48 color litho plates

Trees, by Julia Ellen Rogers, from The Nature Library series, published by Doubleday, Doran & Co.. This is a 1926 edition of a 1917 original.

The book measures 8 1/4" x 5 1/2", has 48 color illustrations (24 plates, there's a picture on each side). There's a little light water spotting or browning to the page edges, which do not extend into the area of the illustration, just the white border.