22 THE VEGETATIVE FUNCTIONS OF PLANTS 



well known, become wilted. Potted plants, if not kept 



FIG. ii. A fern (Cyrtomium falcatum}, well watered and turgid. 

 (Cf. Fig. 12). 



FIG. 12. A fern (Cyrtomium falcatum), deprived of water for 48 hours. 

 The same plant as shown in Fig. n. 



well watered, and plants growing out of doors, if not sup- 

 plied with sufficient rain, will also wilt (Figs, n and 12). 



