EUCALYPTUS TREES. 315 
ordinary English Barley, the Chevalier, the Annat, 
the Dunlop, the long-eared, the black, the Italian and 
the Golden Barley, along with other kinds. <A variety 
with grains free from the sepals constitutes the Sibe- 
rian and the Haliday barley, which, however, is less 
adapted for malt. Dry barley - flour, heated at the 
temperature of boiling water during several hours, 
constitutes Hufeland’s meal for invalids. Barley-cul- 
ture might be carried on in many parts of our Alps. 
Hordeum hexastichan, L.—Orient. The regularly 
six-rowed Barley. This includes, among other vari- 
ties, the Seotch, the Square, and the Bear Barley. 
Seeds less uniform in size than those of H. distichon. 
The so-called skinless variety is that in which the 
grain separates from tke calyx. 
Hordeum secalinum, Schreber. (H. pratense, Hud- 
son. )—Europe, North and Middle Asia, North Ameri- 
ca. Perennial. Famed as the best fattening grass of 
many of the somewhat brackish marsh pastures on 
the North Sea. It never fruits when kept down by 
cattle, and suppresses finally nearly all other grasses 
and weeds. 
Hordeum vulgare, L.—Orient. The four - rowed 
Barley, though rather six-rowed, with two prominent 
rows. Several varieties occur, among them the. 
Spring, Winter, and Black Barley, the Russian, the 
French, the Naked, and the Wheat Barley. Chemi- 
cal principles of malt: Asparagin; a protein sub- 
stance : diastase ; an acid, and cholesterin fat. 
Hordeum zeocriton, L.—Central Asia. Also a two- 
rowed Barley. To this species belong the Sprat, the 
Battledore, the Fulham, and the Putney Barley. 
Hovenia dulcis, Thunberg.—Himalaya, China, Ja- 
