RELATION OF LEAF STRUCTURE TO PHYSICAL FACTORS 6 1 



cuticle 2 ft; chlorenchym (225 ft) 2 close rows prolate palisade cells 

 75 (i ; close subglobose to oblate sponge cells. 



ALPINE SPRUCE : light 0.03 ; humidity 40-60% ; temperature 30- 

 55: diphotophyll i6oft; epidermis lOft; cuticle thin; chlorenchym 

 ( 140 ft) ; 2 loose rows prolate palisade cells 35 p. ; loose globose 

 sponge cells. 



Meadow C. 225/1* P. 2 rows, 150/4 S. 75 /* 



Spruce C. 140 M P. 2 rows, 70 /* S. 70 f> 



85 M 8oj* (53%) 5M (6%) 



Light 1/33; water the same; humidity +(0-5%) ; temperature 



10. 



Ranunculus inamoenus 



SUBALPINE WET MEADOW : light I ; available water 20-30% ; hu- 

 midity 40-70%; temperature 5O-75 : diphotophyll 225 fi; epi- 

 dermis, upper 25 ft, lower 20 /* ; cuticle 2 fi ; chlorenchym ( 180 ft) 2 

 close irregular rows prolate palisade cells 45 ft, ; close oblate sponge 

 cells. 



ALPINE MEADOW: light i; available water 12-17%; humidity 

 40-55%; temperature 4O-65 : diphotophyll 375ft; chlorenchym 

 (325ft) 2-3 close rows prolate palisade cells 50 /*; close irregular 

 sponge cells. 



Subalpine .. C. i8o/t P. 2 rows, 90 A* S. 90 M 



Alpine C. 325 A* P. 3 rows, 150 M S. 175 A* 



+ 145 A* +i row, + 60 A* (66%) + 85 A* (94%) 



Light i; water (8-13%) ; humidity (0-15%) ; temperature 



10. 



Saxifraga interrupta 



SUBALPINE MEADOW : light i ; available water 12-16% ; humidity 

 40-70% ; temperature 5O-75 : diphotophyll 800 fi in center, 300 ft 

 at edges ; epidermis, upper 25 ft, lower 20 ft ; cuticle 2 fi ; chlorenchym 

 (755 ft in center, 255 fi at edges) 3-4 close rather regular rows pro- 

 late palisade cells 50 ft ; and a region of close subglobose cells ; sub- 

 globose to oblong lacunose sponge cells. 



ALPINE MEADOW: light i; humidity 40-55%; temperature 40- 

 65 : no variation from the type. 



Light i; water the same; humidity (0-15%); temperature 



10. 



