U()[U)K.E. ()43 



stipes, one aide next the racliis at the nodes or notches of a simple 

 spike. KachiUa very short, artieuhite above tlie lower glunxes, 

 extending above the llower as a long slender awn or a very narrow 

 glume, llowers perfect or those of the lateral spikelets male or rudi- 

 mentary. Kmpty glumes sul)ulato or lance-linear, firm, ])ersistent, 

 the G at each joint ap[)earing like an involucre; lloral glume lance- 

 olate, round on the back, 5-nerved above, extended into a straight 

 or s[)rcading awn; palea 1)ut little shorter than the lloral glume, 

 ;i-keeled. Stamens 3. Lodicules 2, ciliate. Styles very short, 

 distinct. drain ovoid-oblong or narrow, hirsute at the apex, 

 grooved on the inside, adhering to the palca or rarely free. Erect 

 annuals or rarely })ereiniials, with Hat leaf-blades. Spike cylindri- 

 cal, usually densely llowered with long, or rarely short awns. 



Species l*.*-l(j, iiuligenous to Europe, north Africa, temperate 

 Asia, North and South America. 



Heauvois restricted Ilorileuiti to the common cultivated barley, 

 which appears in a great variety of forms. 'J'he genus, as here 

 understood, is distinguished from J'JIi/mus by the single flower in 

 each spikelet, and is distributeil into three sections: 



1. Zoorn'foH lieauv. Central spikelet alone of each three is 

 fertile, the lateral ones sterile or reduced to em})ty glumes. 



2. Cri/hopsis Jaul). Two perfect spikelets at each notch, the 

 intermediate one defuuent or rarely represented by one or two 

 empty glumes. 



3. < 'Hi'ierd Koo\. Spikelets 3 and collateral, all fertile. 



A. Not in cultivation (a) 



B. Cidtivated for grain (e) 



a. Awns -l-G cm. long 1 



a. Awns 3 cm. long or less (b) 



b. Empty glumes 0.5-0.7 mm. wide, upper blades 1- 



3 cm. long 3 



b. Empty glumes 0.3-0.5 mm. wide, upper blades 10- 



15 em. long 2 



b. Empty glumes narrower (c) 



c. Spike 7 mm. wide ;5 



c. Spike wider (d) 



