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



19. Hordeum distichon angustisjncatum — Continued. 



Outer glumes narrow — Continued. 

 Kernels purple. 



Spike narrow, lax, nodding. 



koernickei K. H. in Beaven (as var., 1902, p. 579). 



20. Hordeum distichon rimpaui Wittm. (Kornieke, 1895, p. 11). 



Outer glumes narrow. 



Spike narrow, lax, nodding typica. 



21. Hordeum distichon nudum Linnseus (1753, p. 85). 



Outer glumes narrow. 

 Kernels white. 

 Awns rough. 



Spike narrow, lax, nodding typica. 



Spike wide, dense, the edges parallel ; awns not widely spread- 

 ing neogenes Kornieke (as var., 1895, p. 10). 



Spike wide, very dense, awns widely spreading. 



gymnocrithum Kornieke (as var., 1895, p. 10). 



Awns wanting duploalbum Kornieke (as var., 1895, p. 8). 



Kernels bluish. 

 Awns rough. 



Spike narrow, lax, nodding. 



rossii Kornieke (as var., 1895, p. 10). 

 Kernels purple. 

 Awns rough. 



Spike narrow, lax, nodding. 



ianthinum Kornieke (as var., 1895, p. 10). 

 Outer glumes wide. 

 Kernels white. 

 Awns rough. 



Spike narrow, lax, nodding. 



nudidublum Kornieke (as var., 1908, p. 431). 



22. Hordeum distichon nigrinudum var. novo. This form was isolated in 1909 

 from an importation of Abyssinian barleys. Two naked seeds were found, 

 which were so black that they appeared to have been charred. They proved 

 viable, however, and have since produced coal-black seeds. In other respects 

 the variety corresponds to nudum. 



Outer glumes narrow. 

 Awns rough. 



Spike narrow, lax, nodding typica. 



Awns wanting duploatrum Kornieke (as var., 1895, p. 8). 



23. Hordeum distichon laccum Kornieke (1895, p. 7). 



Outer glumes narrow. 

 Kernels white. 



Spike narrow, lax, nodding typica. 



Spike wide, dense, erect densum Kornieke (as var., 1895, p. 11). 



24. Hordeum distichon nigrilaxum var. novo. This variety was produced from 

 a cross of horsfordianum and nigrinudum. It is a 2-rowed, hooded barley of 

 the species distichon, with naked black seeds, outer glumes narrow, spike 

 narrow, lax, nodding. 



25. Hordeum deflciens deflciens Steudel (1854, p. 351). 



Outer glumes narrow. 

 Kernels white. 

 Awns rough. 



Spike narrow, lax, nodding typica. 



