IQ4 THE TEACHING BOTANIST 



(4) What is the primary meaning and use 

 of this process in the plant ? Has 

 it the same meaning in the animal ? 

 Your record of (i) and (2) above is to 



be worked out as in Exercise 15 (a). 

 27. Prepare a synoptical essay (not over three hundred 

 words) upon the Germination of the Seed and 

 the Growth of the Embryo into the Adult Plant. 

 To be handed in (here the date). 



Materials. -- Bush Beans (Phaseohis vit/garis, var. Golden 

 Wax) are very easily grown, one in a pot, and may be brought 

 into flower and fruit in about six weeks. Lima and Horse 

 Beans grow so large they are unmanageable. Of course other 

 plants may be used, but the advantage of following some one 

 kind of plant through its entire cycle is very great, and the 

 Bean shows a particularly large number of important features. 

 One plant will do for several students, though the ideal is one 

 to a student. It is easy to obtain others from florists for 

 comparison, and Coleus and Balsam (Jmpdtiens siiltani} are 

 particularly good, though others will do ; one or two of each 

 of these would be enough for a class. 



Pedagogics.- -This exercise, in addition to training as be- 

 fore, is intended to give a clear idea of the morphological 

 composition of the higher plant, and also of the nature of the 

 process of respiration. As to observation, having reached this 

 stage, the student should be able to work out and show the con- 

 stant features of fairly complex structures fully and correctly, 

 and to represent them well. He should not miss the pulvinus 

 of the leaves nor the stipels, nor the very important nodules on 

 the roots, nor the calyx and bracts on the fruit. In morphol- 



