CLIMBERS AND SHADE-LOVERS 



223 



even beyond the point at 

 which the trees intercept 

 the rain and light. It is 

 difficult to establish new 

 trees in the vacancies in an 

 old orchard. 



381. In Chapter VIII we 

 studied the relation of the 

 plant and its parts to sun- 

 light. Plants also compete 

 with each other for light. 

 Plants climb to get to the 

 light (Chapter XVIII). (Fig. 

 77.) Some plants have be- 

 come so modified as to 

 grow in subdued or transmitted light, but no green 

 can grow in darkness. The low plants in forests are 

 lovers. (Fig. 387.) Note the plants that seem to be 

 lovers and those that prefer full sunlight. Some 



390. The tell-tale pine 



plants 

 shade- 

 shade- 

 plants 



