Physiological Anatomy of Xerophytic Selaginellas. 109 
Fig. 111. Selaginella Yupestvis. 1, section of stem; 2, section of leaf; 
3, stomata ; 4, leaf ; 5, habit of plant. All developed in shady and moist green¬ 
house ; 6, section of stem ; 7, section of leaf ; 8, sclerenchyma of leaf ; 9, leaf ; 
10, habit of plant. All developed in semi-arid desert. 
