2oi< (ilJMPSES IS^TO PLANT-LIFE 



parts, and as a consequence we get a four- 

 chambered fruit. The same change takes place 

 in some of the pea family. 



Specimens to be observed : — Examine pollen 

 grains, with lens or microscope, dissect white lily, 

 flower-pollen on glass slide. Observe changes 

 in growing apple, plant broad beans, castor-oil 

 seeds, and maize ; examine spindle-tree berries 

 {euonymus), yew-tree berries, willow .seeds, nut- 

 meg, and mace ; travellers' joy (clematis), section 

 of oak ovary in the pistillate flower. Examine 

 birch catkins and lime-tree flowers. Datura seed- 

 vessel. 



