TO 



LIBERTY HYDE BAILEY 



UNDER WHOSE WISE, STAUNCH AND INSPIRING LEADERSHIP THE 



NATURE-STUDY WORK AT CORNELL UNIVERSITY 



HAS BEEN ACCOMPLISHED 



AND TO MY CO-WORKER 



JOHN WALTON SPENCER 



WHOSE COURAGE, RESOURCEFULNESS AND UNTIRING ZEAL 



WERE POTENT FACTORS IN THE SUCCESS 



OF THE CAUSE 



THIS BOOK IS DEDICATED 



QU 



1968t 



