20 BULLETIN 622^ U. S. DEPARTMEXT OF AGRICULTUEE. 
19. Hordeum (UsticJion angustispicatum — Continued. 
Outer glumes narrow — ContinuecL 
Kernels purple. 
Spike narrow, lax, nodding. 
Jcoernickei K. H. in Beaven (as var.. 1902, p. 579). 
20. Hordeum disticJion rimpoui Wittm. (Kornicke. 1895, p. 11). 
Outer glumes narrow. 
Spike narrow, lax. nodding tupira. 
21. Hordeum distich mi nudum Linnaeus (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 Kornicke (as var., 1895, p. 10). 
Spike wide, very dense, awns widely spreading. 
gymnocriiluim Kornicke (as var.. 1895, p. 10). 
Awns wanting duploalhum Kornicke (as var., 1895. p. 8). 
Kernels bluish. 
Awns rough. 
Spike narrow, lax, nodding. 
ro8sii Kornicke (as var.. 1895, p. 10). 
Kernels purple. % 
Awns rough. 
Spike narrow, lax, nodding. 
ianthinum Kornicke (as var., 1895, p. 10). 
Outer glumes wide. 
Kernels white. 
Awns rough. 
Spike narrow, lax. nodding. 
nndiduUum Kornicke (as var., 1908, p. 431). 
22. Hordeum d.i^tichon 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 Kornicke (as var., 1895, p. 8). 
23. Hordeum disticJion la.rum Kornicke (1895, p. 7). 
Outer glumes narrow. 
Kernels white. 
Spike narrow, lax, nodding typica. 
Spike wide, dense, erect densum Kornicke (as var., 1895, p. 11). 
24. Hordeum distiction nigrilaxum var. novo. This variety was produced from 
a cross of horsfordianum and nigrinudum. It is a 2-rowed, liooded barley of 
the species distichon. with naked black seeds, outer glumes narrow, spike 
narrow, lax, nodding. 
25. Hordeum deficiens deflciens Steudel (1854, p. 351). 
Outer glumes narrow. 
Kernels white. 
Awns rough. 
Spike narrow, lax. nodding typica. 
