which takes place, (b) Observe that the base of the grain is equipped with basal hairs. 

 Are these hairs as well developed in common cultivated oats? (c) What in your opinion is 

 the explanation of a less development of awns and hairs in cultivated oatsr 1 (d) In what 

 way may the twisting of the awn and the presence of basal hairs be of help to the wild oat? 



14. Make a drawing (2x) of the oat grain (side view, showing awn). 



15. Make a drawing (2x) of the oat kernel (suture view). 



16. Examine several very large grains of threshed Swedish Select or other large grained 

 oats. (a) What tendency do you observe for one grain to partially enclose another? (b) 

 If one grain encloses another what do ycu find as to the relative filling of the two grains? 

 (c) How does Kherson or Texas Red compare in this respect with the above? 



17. What relation do you observe to exist between the plumpness of a grain and the 

 exposure of the palea? Do not mistake the exposure of an enclosed grain for the palea. 



18. Oats are best adapted to cool, rainy countries. Does there appear to be any relation 

 between this fact and the size and position of the outer glumes of the growing spikelet? 



87 



