6 PREFACE. 
In the preparation of this work the writer is indebted for assistance, 
first of all, to Dr. A. W. Chapman, the veteran Sou.hern botanist; to 
Prof. Charles S. Sargent for aid rendered in the free use of the 
library of the Arnold Arboretum and advice in perplexing questions 
of nomenclature, and to Mr. Charles Faxon, of the Arnold Arboretum, 
for bibliographical assistance; to Dr. N. L. Britton and Dr. J. K. Small, 
of the Columbia University; to Dr. William Trelease, of the Missouri 
Botanical Garden; to Prof. F. Lamson-Scribner, chief of the Division 
of Agrostology, United States Department of Agriculture; to Mr. F.V. 
Coville, chief of the Division of Botany, and his assistant Mr. T. H. 
Kearney, jr.; and to Dr. J. N. Rose and Mr. Charles L. Pollard, assistant 
curators of the National Herbarium, for facilities afforded; also to 
Dr. Edward L. Greene, of the Catholic University, for his revision of 
doubtful and new forms of Compositae; and to Prof. L. H. Bailey for 
his help in Carex. Thanks are due, also, to Dr. B. E. Fernow, late 
chief of the Division of Forestry, for help rendered in the arrangement 
of the general part of the work for the press, and to Mr. George B. 
Sudworth, dendrologist of that Division; and lastly to Mr. C. D. 
Beadle, director of the Biltmore Herbarium, and _ his associate, 
Mr. F. E. Boynton, for their assistance while consulting the Biltmore 
Herbarium and Library. 
The writer with pleasure takes this occasion to express his gratitude 
for the friendly aid extended to him by many of his fellow-citizens 
while engaged in the field, and to President Milton Smith, of the 
Louisville and Nashville Railroad, to the Hon. T. G. Bush, president of 
the Mobile and Birmingham Railyay, and to Col. E. L. Rinse, presi- 
dent of the Mobile and Ohio Railroad, for courtesies liber ally extended 
to him in his travels through the State. Without the aid received 
from these sources the appearance of this volume could not have been 
accomplished. 
CHARLES MouR. 
