49 6 



RELATION TO ENVIRONMENT. 



spaces, a lesser development of stomata, hairy covering, deeply 

 sunk stomata, slime-cells, water reservoirs, etc. These plants 

 are sometimes called xerophytes, but they differ from most land 



Fig. 4900. 

 Winter condition of forest, the resting season. (Photograph by Rowlee.) 



xerophytes in their power to absorb water with a higher concen- 

 tration of salts without injury to the protoplasm. 



