16 THE ROYAL SOCIETY OF CANADA 



winter variety, ripening a few heads about the middle of August, 

 nearly a month later than the date of maturing of the full crop of 

 heads produced in seasons when it behaved as a spring variety. 

 Evidently the Arlington cannot be depended on to act always as a 

 spring barley in this climate. However, nearly all the progeny 

 obtained from crosses between the Arlington and other sorts have 

 behaved as spring varieties. 



While Mr. Derr describes the Arlington barley as beardless, the 

 writer finds that at Ottawa it usually has awns on the two median 

 rows of kernels. These awns may be only half an inch or less in 

 length but are frequently much longer, especially at the edge of a 

 plot or on plants which are isolated. But the awns are never well- 

 developed, as in ordinary varieties. The remaining four rows (the 

 lateral rows) of kernels are awnless. The appearance of the head is 

 therefore very peculiar, owing to the difference — sometimes very 

 marked— between the median and lateral rows. 



Crosses between Arlington and other sorts 



In 1912 some crosses were effected between the Arlington and 

 other sorts, in order to study, among other things, the inheritance of 

 awns and hoods when one of the parents possessed such unusual 

 characteristics. The following were the crosses made: 



Arlington (female) X465 C (male). 



Arlington (female) X 578 D (male). 



Ariington (female) X 475 M (male). 



The three varieties used as males are cross-bred sorts, quite fixed 

 in character, which were produced by the writer. 465 C is a six-row 

 variety, bearded and hulless, with green seeds. 578D is a two-row 

 variety, hooded and hulless, with yellow seeds. 475M is a two-row 

 variety, bearded and retaining its hull. 



The cross-bred plants obtained in the first generation were as 

 follows : 



From the cross Arlington X465C, one plant (No. 901) ; from the 

 cross Arlington X578D, fourteen plants (Nos. 902 to 909 and 922 to 

 927); and from the cross Arlington X475M, twelve plants (Nos. 910 

 to 921). 



In the first generation all the plants from each cross were essenti- 

 ally alike. The annexed photograph (plate A) will be of assistance in 

 obtaining a clear idea of the appearance of the heads of these first- 

 generation plants. 



