For notes on the behaviour of the newer introductions and for valuable assistance in the checking of the plant lists the author is indebted to M. H. Horvath, Landscape Architect, Cleveland, Ohio, and to Henry Kohankie, Nurseryman, Painesville, Ohio, both of whom have done important work in the introduction and testing of many sorts of plants.
For many valuable observations on the behaviour, hardiness, and adaptability of ornamental plants in their respective sections of the country the author is indebted to Charles H. Ramsdell, Landscape Architect, and Phelps Wyman, Landscape Architect, of Minneapolis, Minnesota, and to A. M. Hill, Nurseryman, of Dundee, Illinois.
In addition the author is indebted: For lists of plants adapted to the South Atlantic States, to Charles F. Gillette, Landscape Architect, Richmond, Virginia, and to Earle Draper, Landscape Architect, Charlotte, North Carolina; and for lists of plants adapted to the Oregon and Washington Coastal Plain to Professor Arthur L. Peck of the Oregon State Agricultural College at Corvallis, Oregon.
For lists of plants and much information concerning planting and seeding methods in Florida the author is indebted to E. N. Reasoner, Nurseryman, Oneco, Florida; H. H. Hume, Nurseryman, Glen St. Mary's, Florida, and C. L. Whipp, Florist, Jacksonville, Florida.
For much valuable information about the preparation of lawns and golf course fairways and greens in Florida the author is indebted to O. B. Roche, Superintendent of the Palm Beach Golf Course, Palm Beach, Florida, and to J. R. Van Kleek, Sebring, Florida.
For numerous practical suggestions covering landscape uses and notes on the propagation and maintenance of all sorts of ornamental plants the writer thanks George Jacques, Superintendent of "Gwinn," Bratenahl Village, Ohio; J. R. Brydon, Superintendent of "Glen Allen," Cleveland, Ohio, and E. 0. Orpet, formerly Superintendent at "Walden," Lake Forest, Illinois.
For unselfish devotion to the oftentimes uninteresting work of copy reading, checking, and indexing, without which this work would never have been completed, much credit is due to the following members of the author's office staff: Gordon D. Cooper, W. Hoxie Hillary, Lucie L.
French, Eleanor Hills Christie, J. R. Van Kleek, E. H. Trout, Frank B. Meyer, and Anne C. Thompson.
For many of the illustrations in this book the author is indebted to the following persons:
Mattie Edwards Hewitt for plates Nos. 12, 21, 26, 44, and 48;
The D. Hill Nursery Company for plate No. 17;
Mary E. Eaton for plates Nos. 31, 34, 35, 36, 38, 39, 46, and 49;
Mr. and Mrs. F. F. Prentiss for plates Nos. 11, 20, 47, 52, 53, and 60;
Mr. W. G. Mather for plates Nos. 1, 15, 24, 27, and 28;
J. Horace McFarland Company for plates Nos. 18, 22, 23, 30, 32, 37, 40,41,43, 56, 57, and 58;
Woodlawn Cemetery Association for plate No. 42;
The Wm. H. Moon Company for plate No. 7;
Nathan R. Graves Company for plate No. 33;
Mr. and Mrs. W. A. Thomas for plate No. 51;
Mr. and Mrs. Charles F. Lang for plates Nos. 45 and 54;
Mr. and Mrs. Charles Reed for plate No. 19.
Future Cooperation Invited. Corrections and criticisms will be always welcomed by the author, and this volume will be enlarged and corrected as conditions justify.
Albert D. Taylor.
Prospect and Forty-sixth Streets,
August 1, 1920.