54 EDITH SCHWARTZ CLEMENTS 



Light 33/1 ; water 10% ; humidity (0-15%) tempera- 

 ture 10. 



Draba streptocarpa 



ALPINE SPRUCE SHADE: light 0.03; available water 12-16% ; hu- 

 midity 40-60%; temperature 3O-55 : diphotophyll 300/4; epi- 

 dermis 25/1; cuticle 4/4; chlorenchym (250/4) 2-3 close rows pro- 

 late palisade cells 40-60 p. ; close subglobose sponge cells. 



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

 55%; temperature 4O-6o : diphotophyll 400 /a; chlorenchym 

 (350/4) 3-4 close rows subglobose to prolate palisade cells 50/4; 

 close subglobose sponge cells. 



Spruce C. 250 M P. 2-3 rows, 125 /* S. 1251* 



Meadow C. 350 A* P. 3-4 rows, 175/0 S. 175 A* 



+ 100 /* +i row, + 50 A* (40%) + 50 M (40%) 



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

 + 10. 



Pseudocymopterus tenuifolius 



SPRUCE SHADE : light 0.03 ; available water 12-16% ; humidity 

 40-70% ; temperature 48-72 : diphotophyll 210 p.; epidermis 25/4; 

 cuticle thin; chlorenchym (160/4) 2 compact rows prolate palisade 

 cells 50/1; compact globose and oblate sponge cells with central 

 region of larger clear cells. 



SHADY BROOK BANK: light o.on; available water 18-20%; hu- 

 midity 60-85%; temperature 47-69 : diphotophyll 200/4; chlor- 

 enchym (150/4) 2 loose rows prolate palisade cells, the first row 

 60 /4, the second 40 p., looser and sometimes lacking ; globose and 

 oblate sponge cells with central large clear cells. 



Spruce C. 160 A* P. 2 rows, 100 A* S. 60 M 



Brook bank . C. 150 f. P. 2 rows, IOOA* S. 50 M 



IDA* o IDA* (16%) 



Light 1/3; water -f (4-6%) ; humidity + (15-20%) ; tempera- 

 ture (i-3). 



HALF GRAVEL: light i; available water 4.5-7.5%; humidity 30- 

 65%; temperature 5i-76: diphotophyll 225/4; epidermis, upper 

 25-40/4, lower 25/4; cuticle 3/4; chlorenchym (175/4) 2 compact 

 rows narrow prolate palisade cells, first 75 /4, second 50 p. ; compact 

 globose sponge cells. 



