nuukcl, and wliicii 1 luive also searched lor in vain in all the Scandinavian puhlic 

 libraries. 



Among Scandinavian botanists, who have kindly lent me assistance in different 

 ways, for instance in the denomination of critical species, in procuring literature 

 etc., I am glad to acknowledge my indebtedness to Rector L. M. Neumann, Docent 

 Dr. GuNNAR Samuelsson, 1)i-. H. Dahlstedt, the Rev. S. K. Enandek, Piolessor 

 Dr. N. WiLLE, Gustos Ove Dahl, School-manager A. Notg, c.r. E. Jorgensen, and 

 School-manager K. Traaen. 



To Dr. B. Lysholm. Trondhjem, who has liberally defrayed the expense of the 

 illustrating plates, I beg to return here my sincere thanks. 



Trondhjem, January 16tli 1919. 



Henrik Printz. 



