EXERCISE 59 

 COMPARISON OF SEEDS AND SEEDLINGS 



Materials. Seeds and seedlings of as many as possible of the 

 following, and any other seedlings that may be readily secured : 

 pea ; castor bean ; pumpkin or winter squash. 



Directions for work. Compare these seeds and seedlings with 

 each other and with the bean or peanut, noting differences. 



The principal differences noted will be that the pea cotyledons 

 are not raised above the ground ; the cotyledons of the castor 

 bean are not stored with food materials and become effective 

 working leaves ; and in the pumpkin, though the food is stored 

 in the cotyledons, they become large and remain long on the 

 plant, while the plumule is very slow in developing. 



References 



BERGEN and CALDWELL. Practical Botany, pp. 141-142. 

 BERGEN and CALDWELL. Introduction to Botany, p. 164. 



