value, some of which can undoubtedly be transferred to 
maize (cf. Reeves and Bockholt, 1964). Thus, maize 
breeders might select Tripsacum for introgressive pur- 
poses from the region in which they are interested. In 
this connection, Beckett and Lambert have already con- 
ducted a state-wide survey of Tripsacum in Illinois for 
possible maize breeding purposes (Lambert, 19638). 
ACKNOWLEDGMENTS 
Sincere appreciation is expressed to Dr. Paul C. Man- 
gelsdorf, Director of the Botanical Museum, for his sug- 
gestions and encouragement during the course of the 
investigation and during the preparation of the manu- 
script. 
The skillful assistance rendered by Uma S. Tantravahi 
in the preparation of much of the cytological material is 
sincerely appreciated. 
The final stages of the cultural work involved in this 
investigation were completed at the Waltham Field 
Station of the University of Massachusetts. Our indebt- 
edness to the Field Station for providing the necessary 
space and many courtesies is gratefully acknowledged. 
[ 313 | 
