48 EDITH SCHWARTZ CLEMENTS 



Light decreased; water, humidity and temperature unchanged. 



DEEPLY SUBMERGED: light : leaf 290 ju,; epidermis 25^; chlor- 

 enchym (150/4) a one-celled layer of oblate cells next to the epi- 

 dermis 15/4, looser than the preceding; diaphragm cells elongated 

 and disappearing. (Plate I, fig. 5 c.) 



Floating ......... C. 570 /* P. 3~4 rows, 120 M S. 15 M 



Deeply submerged C. 150 A* _ P. i row, 15 M S. 15 M 



420/4 (2-3) rows, 105 p (97%) o 

 Floating ........................... ............ Air spaces, 435 M 



Deeply submerged .............................. Air spaces, 120 M 



315 M 

 Light decreased; other factors unchanged. 



MESOPHYTA 

 SCIOPHYTA 



Clematis HgusticifoHa 



FOOTHILL THICKET: light 0.0125 ; available water 11% ; humidity 

 38-80% ; temperature 53-&5 : diphotophyll 125 //,; epidermis wavy, 

 upper 25-30/4, lower 20-30/4; cuticle thin; chlorenchym (90/4) I 

 row funnel palisade cells 25 p. ; loose globose sponge cells. 



FOOTHILL SUNLIGHT : light i ; available water 1 1 % ; humidity 

 28-77% 5 temperature 57-89 : diphotophyll 200 p. ; epidermis, 

 upper 25 /4, long flat cells, lower 20 /4 ; cuticle 3 p. ; chlorenchym 

 (155/4) i row prolate palisade cells 75 /A; irregular sponge cells. 



Thicket ....... C. 90 /* P. i row, 25 M S. 65 M 



Sunlight ....... C. 155 M _ P. i row, 75 M _ S. 80 /* _ 



+ 65M +5QM (200%) +25M (38%) 



Light 80/1 ; water unchanged; humidity (3-10%); tempera- 

 ture + 4. 



Chenopodium fremontii 



FOOTHILL THICKET : light 0.0125 ; available water 11% ; humidity 

 38-80%; temperature 53-85 : diphotophyll So/*; epidermis 15/4; 

 cuticle thin; chlorenchym (50/1) i row subglobose and funnel cells 

 2O/t; oblate sponge cells. 



FOOTHILL SUNLIGHT: light i; available water 4.5-7.5%; hu- 

 midity 28-77%; temperature 57-89 : diphotophyll 225/1,; epi- 

 dermis 25 /A; cuticle 4 /A; chlorenchym ( 175/0 l row prolate pal- 

 isade cells 65 p, ; close globose sponge cells. 



