BOTANICAL .SUEYEY— SUGAR GROYE REGION 



279 



Together with these are numerous individuals from the lichen zone 

 on one side and the forest on the other. 



This zone is in realitv merely an extension of the underbrush of the 



Fig. 18. Fi-Hitini,' Oxydi'iulruiii in tlie Oak l-'orcst. At tlie Leit ('iist:nia dciitnta. At the 

 Risrlit Acer rubrum. In the Background Quercus sp. 



pine forest behind it on to thinner soil lliaii can support tree growth. 



The Pine Forest. The zonal series is completed hy llie pine forest, 



which occupies the poorest soil capable of suppoi-ting ai-borescent plants. 



