FLOWERS AND FRUITS 163 



the seeds. Try the same experiment with pods of 

 vetches, lupines, and similar plants. 



Get some plants of wood sorrel (oxalis), and balsams, 

 with ripe fruits on them. Slightly squeeze the fruits and 

 notice how they curl up, and shoot out the seeds. By 

 placing a sheet of paper under the plant, find out how 

 far the seeds are thrown. 



Make similar observations on the violet. Sketch 

 the fruits of all these plants before and after they have 

 opened, and try and understand what really goes on in 

 each case. 



