1/6 THE TEACHING BOTANIST 



appendages may be outgrowths of the seed-coat, or of ovary, 

 style, or calyx, retained for the purpose. They may consist of 

 wings or plumes to utilize the wind, hooks for attachment to 

 the fur of animals, pulp to be eaten by animals, or may be 

 absent altogether, in which case the seeds are often projected 

 by the springing of elastic tissues. 



IV. The Germination of the Seed and Growth 



of the Embryo 



10. Study the germinating Lima Beans, and, in com- 

 parison with your records of the ungerminated 

 bean, observe : - 



(1) Whether all seeds have developed at 



the same rate. If not, why not ? 



(2) Where and by what force has the coat 



been burst ? 



(3) What change has occurred in the food 



substance ? 



(4) What changes of shape and size have 



occurred in the parts originally in the 

 seed ? 



(5) Have any new parts appeared? 



(6) Does hypocotyl or plumule develop 



most rapidly ? Why ? 



(7) What directions do hypocotyl and plu- 



mule take in development, relatively 

 to: 



