(c) Why have not all "seeds" of the foregoing grass a silvery color? 



(d) Which grass has "seeds" that are rather light colored? 



8. Miscellaneous, (a) In which are the edges of the palea strongly serrated? 



(b) In which has the palea three prominent nerves? 



(c) Which grass has normallly a considerable percent of naked "seed"? 



(d) Of such "seeds" of the foregoing grass as are not naked, what is the texture or 

 nature of the covering immediately about the "seed"? 



(e) How does the texture of this covering differ from that of most of the other grass 

 "seeds"? 



(f) What does this covering appear to be — structurally speaking? 



(g) From the "seed" of what grass may a sort of outer hull be easily removed — thus 

 exposing a thin inner covering which can also be removed? 



(h) Can you explain what these outer and inner coverings are — structurally speaking? 



(i) It is the "seeds" of the two foregoing grasses which are lacking in the rachilla joint 

 common to all the other grass "seeds" you are studying. What would be your explanation 

 of this missing part? 



(j) Two (occasionally more) "seeds" of what grass are frequently found still clinging 

 together? 



(k) If a considerable percent of the "seeds" of the foregoing grass are attached to each 

 other, and particularly if the "seeds" look unusually light in color, what do you suppose this 

 would signify as to the quality of the "seed"? 



9. Drawings. Make two careful drawings of what seems to be a typical specimen of the 

 "seed" of each species of grass — drawing first the palea view and then a side view of each "seed." 

 Make each dimension of your drawings five times that of the specimen. This will make the 

 area of your drawings twenty-five times the surface area of the side of the "seed" which you 

 are drawing. 



100 



