TRA NSACTIONS 



OF THK 



itioba ^catum institute of Science 



SESSION OF 1916-1917. 



(Vol. XIV Part 3) 



A New Evening Primrose. Oenothera Novae-Scotiae. 

 — By Reginald Ruggles Gates, Ph. D., F. L. S., some- 

 time Lecturer in. Biology and Cytology in the University of 

 London, and Acting Associate Professor of Zoology in the 

 University of California. 



(Reafl 13 November 1916) 



The number of species of Oenothera was, until recently, 

 supposed to be very limited. Although pre-Linnaean botanists 

 described briefly a number of forms which they grew in their 

 gardens, introduced from North America, yet Linnaeus 

 recognized at first only one species, which he afterwards 

 called Oe. biennis. He later described several other species, 

 but the name Oe. biennis came to be applied generally to 

 nearly all the forms in Eastern North America, and to those 

 which had been naturalized in Europe as well. 



The investigations of de Vries on mutation in Oe. Lamarck- 

 iana aroused new interest in the genus, and in recent years 

 an intensive study of the group has produced a voluminous 

 literature and has led incidentally to the recognition of a 

 large number of forms which formerly passed under the name 



Proc. & Thv.ss. N. S Inst. Sn., Vol. XIV. Tkans. 10 



(141) 



