

A MANUAL OF THE 



NORTH AMERICAN 

 GYMNOSPERMS 



EXCLUSIVE OF THE CYCADALES BUT 



TOGETHER WITH CERTAIN 



EXOTIC SPECIES 



BY 

 DAVID PEARCE PENHALLOW, D.Sc. 



MACDONALD PROFESSOR OF BOTANY, McGiLL UNIVERSITY 



BOSTON, U.S.A. 

 GINN & COMPANY, PUBLISHERS 



Clje SUjjenacum p 

 1907 



