7. The rows of kernels on an ear of corn are always in pairs. This arrangement may or 

 may not be very evident. Pairing may then be described as distinct or obscure. 



Figs. 38-39. 



Pairing of rows. 



Evident. Obscure. 



(Anderson.) 



8. At the tip of the ear the cob is either covered or exposed. 



Fig. 40. 



Tip covered. 



(Anderson.) 



Fig. 41. 

 Tip exposed. 

 (Anderson.) 



63 



