6O EDITH SCHWARTZ CLEMENTS 



SHADY BROOK BANK: light 0.016; available water 25-30%; hu- 

 midity 60-85%; temperature 47-69 : diphotophyll 200/1,; epi- 

 dermis, upper 20-40 /4, wavy, lower 15-20/4; cuticle thin; chlor- 

 enchym (150 /A) I loose row funnel palisade cells (the majority 

 prolobate) ; very lacunose oblate sponge cells. (Plate VII, fig. 3 &.) 



Sunlight C. 250 M P. I row, 75 M S. 175 /* 



Shade C. 150 /* P. i row, 45 /* S. 105 n 



IOOM 30/u (40%) 70M (40%) 



Light 1/65; water -[-(5-10%) ; humidity -{-(10-15%) ; tempera- 

 ture (3 o_60). 



Swertia scopulina 



SUNNY BROOK BANK: light i ; available water 15-25% ; humidity 

 50-70%; temperature 5O-75 : diphotophyll 250/1; epidermis, 

 upper 30 /*, lower 25/1,; cuticle 3/4; chlorenchym (195 /A) 1-2 rows 

 subglobose, prolate and prolobate palisade cells 30/4; lacunose ob- 

 long sponge cells. 



ALPINE MEADOW (dwarf) : light i ; available water 12-17% > hu- 

 midity 40-55%; temperature 4O-6"5 : diphotophyll 350/4,; cuticle 

 5 p.; chlorenchym (295/4) 3-4 rows closer palisade cells; loose 

 irregular and oblong sponge cells. 



Brook bank C. 195 M P. 2 rows, 60 M S. 135 M 

 Meadow ... C. 295/4 P. 4 rows, 140 M S. 155 v- 



+ IOO/* + 2 rOWS, + 80 V- (133%) +20M (15%) 



Light i; water (3-8%); humidity (5-10%); temperature 



10. 



Polygonum bistortoides 



SUNNY BROOK BANK: light i; water-content 15-25%; humidity 

 50-70%; temperature 5o-75 : staurophyll 275/1; epidermis 25/1; 

 cuticle 3/4; chlorenchym (225/4) loose chains of prolate palisade 

 cells extending across the leaf, looser in lower half 25-50/4. 



ALPINE GRAVEL (dwarf) : light i ; available water 2.5-5.5% 5 hu- 

 midity 30-50% ; temperature 4O-65 : similar to type except that 

 tissues are compact instead of loose. 



Light i; water (12.5-19.5%) ; humidity 20%; temperature 



10. 



Sieversia turbinata 



ALPINE MEADOW : light i ; available water 12-17% J humidity 40- 

 55% > temperature 4O-65 : diphotophyll 275/4; epidermis 25/4; 



