THE 



Ohio Journal of Science 



PUBLISHED BY THE 



Ohio State University Scientific Society 



Volume XVII JUNE, 1917 No. 8 



TABLE OF CONTENTS 



Waller — Xenia and Other Influences Following Fertilization 273 



KiSLiUK — Some Winter Observations of Muscid Flies 285 



OSBORN AND DRAKE — Notes on American Tingidie with Descriptions of 



New Species 295 



Laughlin — The Brassicacete of Ohio 308 



Oberholzer — Notes on the Fringilline Genus Passerherbulus and its 



Nearest Allies 332 



XENIA AND OTHER INFLUENCES FOLLOWING 



FERTILIZATION.- 



Adoli'h E. Waller. 



Occurrence of Xenia. 



A great deal of confusion between near and remote influences 

 from alien pollen has come about as the result of laxly grouping 

 together under the topic "xenia," a miscellaneous assortment 

 of phenomena more or less closely associated with fertilization 

 and embryo development. Xenia is hybridization exposed. 

 The effect of foreign pollen is made immediately apparent in 

 the endosperm of some angiosperms. Maize has come to be 

 the classic example for illustrating xenia, but VoN Rumker (1) 

 in 1911, and others have called attention to its occurrence in 

 rye. Though known best through the cultivated plants, it is 

 possible to have xenia in any of the angiosperms in which 

 differences exist in the color or composition of the endosperm. 

 In many species differences really present may not be known 

 because the endosperms are covered by other, often opaque, 



*Contribution from the Botanical Laboratory, Ohio State University, No. 97; 

 Read in New York City before the thirteenth annual meeting of the American 

 Genetic Association, December 28, 1916. 



273 



