MANUAL OF NATURE STUDY. 141 



SEVENTH YEAR. 



^.— Pi,ANT Life. 



1. Review and continue the study as outlined 

 for the sixth year. 



2. Study flowers whose floral envelopes are 

 more or less grown together, etc. (a.) Review 

 parts of the flower as in third grade work, and call 

 attention to the essential organs and their relation 



, to the perianth. It must be borne in mind that the 

 essential organs are stamens and pistils, the former 

 bearing the male elements, the latter the female 

 elements ; that the business of the flowering plant 

 is to produce seed, and that fertilization is necessary 

 to the production of seed. 



What is Fertilization? 



Let the pupils be supplied with an ample supply 

 of flowers containing conspicuous stamens and 

 pistils. As far as practicable, the flowers should 

 be of the same kind, so that, when you give direc- 

 tions, there may be nothing to hinder any of the 

 pupils from careful observation. Lead the pupils 

 to see that the stamen is made up of a filament 

 and anther, and that the anther is the pollen pod 

 just as a pea pod is a seed pod. 



With needles open the pollen case and observe 

 that it is filled with a powdery mass called pollen, 



