CONTRIBUTIONS 8 THE NEW YORK BOTANICAL 
DEN—No. 80. & 
HERBY 
AND 
THE ORIGIN OF SERCIeS 
LECTURE GIVEN BEFORE THE BARNARD 
BOTANICAL CLUB, COLUMBIA 
UNIVERSITY 
DECEMBER 18, 1905 
BY 
DANIEL TREMBLY MACDOUGAL 
DIRECTOR DEPARTMENT OF BOTANICAL RESEARCH, 
CARNEGIE INSTITUTION OF WASHINGTON 
THE OPEN COURT gees ee COMPA 
LONDON AGENTS : 
KEGAN PAUL, TRENCH, TRUBNER * <os LTD. 
1905. 
