JOHN TORREY, LL. D., 



CORRE8P. MEMBER OP THK LINXiAN 80CIETT. KTC.. 



THIS VOLUME IS DEDICATED, 



IN GRATEFUL ACKNOWLEDGMENT 



OF THE FRIENDSHIP WHICH HAS HONORED AND TUB COUNSEL 

 WHICH HAS AIDED 



THE AUTHOR 



FROM THE COMMENCEMENT OF HIS BOTANICAL PURSUITS. 



CAJTBRIDGE January 1 1S48. 



132502 



