22 BULLETIN 622, U. S. DEPARTMENT OF AGRICULTURE. 



31. Hordeum defidens sublaxum Kornicke (1908, p. 433). 



Outer glumes narrow. 

 Kernels white. 



Spike narrow, lax. nodding typica. 



32. Hordeum defidens gymnospermum Kornicke (1895, p. 11). 



Outer glumes narrow. 



Spike narrow, lax, nodding typica. 



REJECTED SPECIES, SUBSPECIES. AND VARIETIES. 



In the analysis of the relative value of the variable characters, of 

 barley, a number of variations were regarded as of too minor a nature 

 to be used even in the description of named subvarieties. These in- 

 cluded the elevation of the hood on a short awn,' awns produced 

 on the hood itself, malformed awns, short awns, the nature of the 

 hairs on the rachilla, the toothing of the nerves of the lemma, and the 

 widening of onty the two outermost glumes at a node. Varieties 

 established upon these characters are not recognized in the key. Inas- 

 much as the names- often appear in papers on barley, a statement of 

 the nature of the variation is necessary for reference use. For this 

 reason an alphabetical list of discarded species and varieties has been 

 prepared. A few groups founded on other bases have been included. 

 The most important of these is probably that of compound spikes. 

 The inclusion of compound spikes as a recognized character would 

 simply double the number of varieties. In barley, proliferation of 

 spikes is common, but in most strains it is not inherited. In others, 

 while the tendency is transmitted, it is inherited imperfectly. Even 

 if it were perfectly heritable its use would offer little of advantage. 

 The list also contains various synonyms which have been published 

 from time to time. In a few instances names occur both in the key 

 and in the list of rejected forms. In these cases the names have 

 been used in two or more ways and in the misapplied use appear 

 here. Where the form is compared with one in the key, it bears the 

 ke}^ number of the recognized variety. 



ALPHABETICAL LIST OF REJECTED SPECIES, SUBSPECIES, AND VARIETIES. 



abyssiniciiin Seringe (1842. p. 194, as. var.), as originally described equal to 



the species defidens. 

 aegiceras Royle (1839, p. 418), synonym for 77. v. trifurcatum (7). 

 aetliioplcum Alefeld (1866, p. 343), synonym for 77 . distichon nigricans (18). 

 albidum Kornicke (1873. p. 4), synonym for 77. v. pallidum (1). 

 angustissimum Kornicke (1908, p. 432. as var.), synonym for 77. distichon 



laxum (23). 

 atratum K. H. in Beaven (1902, p. 597, as var.), synonym for 77. defidens 



steudelii (26). 



atterbergianum Kegel (1908. p. 77, as var.), synonym for 77. defidens steudelii 

 subglabrum (26). 



