Grade. 

 Date.. 



EXERCISE 16 

 TYPES OF BARLEY 



Object. To learn the important types of barley. 



Explanation. Barley differs from wheat and rye in having three flowers 

 at a joint of the rachis, and but one grain per spikelet. In the six-row barleys 

 all three flowers are fertile and bear grains. In the two-row barleys the 

 lateral flowers are sterile (undeveloped). It will be observed that the outer 

 or empty glumes are very narrow in barley while in wheat and oats they are 

 broad, enclosing the flower. Read carefully Chapter XXIII in Productive 

 Farm Crops before starting this exercise. 



Materials. Head and grain samples of: 



1. Six-row barley (Hordeum hexastichum) . 



2. Common six-row, lateral grains overlapping, sometimes called four- 

 row (Hordeurn vulgare). 



3. Two-row barley, slender heads (Hordeum distichum). 



4. Two-row barley, broad heads (Hordeum zeocrithum). 



5. Hulless barley (hooded type). 



6. Hulless barley (awnless type). 



Outline for Describing Barleys 



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