THE IDENTIFICATION OF VABIETIES OF BAELEY. 15 



Hordeum distichon — Continued. 

 Kernels naked. 



Lemmas awned or awnless. 



Kernels white, blue, or purple 21. nudum. 



Kernels black 22. nigrinudum. 



Lemmas hooded. 



Kernels white, blue, or purple '__ 23. laxum. 



Kernels black 24. nigrilaxum. 



Hordeum deficient. Barleys in which the lateral florets 

 are not only sterile but rudimentary. 

 Kernels hulled. 



Lemmas awned or awnless. 



Kernels white, blue, or purple 25. deflciens. 



Kernels black 26. steudelii. 



- Lemmas hooded. 



Kernels white, blue, or purple 27. triceros. 



Kernels black 28. tridax. 



Kernels naked. 



Lemmas awned or awnless. 



Kernels white, blue, or purple 29. nudideficiens. 



Kernels black 30. decortication. 



Lemmas hooded. 



Kernels white, blue, or purple 31. sublaxum. 



Kernels black 32. gymnospermum. 



The 32 varieties described above are thought to constitute the 

 major variations in barley. It is possible that a group of Abys- 

 sinian barleys may later be added to the intermediate forms, but it 

 is hoped that this may be avoided. In the list of subvarieties which 

 follows there have been no additions, although many new sorts are 

 available. It is thought best not to add to this list of named sorts, 

 as the large number of names is already confusing. The list of sub- 

 varieties is made up entirely of forms that have been published as 

 varieties, but which are little more than variations of an established 

 type. As these names have been used and as the distinctions have 

 some foundation, even though often a fragile one, it is necessary to 

 indicate the group each was intended to describe. It can not be too 

 strongly recommended, however, that additions be made to the list 

 of subvarieties only when the value of the addition is above question. 

 At the present time the writer has in his possession blue, -purple, 

 and smooth-awned variations in a large number of new combina- 

 tions. A dense form of tonsum has been received recently from 

 Japan. Many dense forms of deficient barleys have been isolated 

 from Abyssinian barley, with a complete series of colors. The addi- 

 tion of these to the named subvarieties seems to offer no advantages, 

 and when they are described it will be only in a list of agronomic 

 varieties which is expected to supplement the present publication. 



