68 EDITH SCHWARTZ CLEMENTS 



Light 1/33; water +(9-13%) ; humidity +(5-10%); tempera- 

 ture (3-4). 



Pentstemon glancus 



GRAVEL: light i; available water 2.5-5.5%; humidity 30-65%; 

 temperature 55-76 : diphotophyll 300/1; epidermis, upper 25/1, 

 lower 20 /t; cuticle 3/1; chlorenchym (255/1) 3 compact rows pro- 

 late palisade cells 50/1; compact subglobose sponge cells. 



ALPINE SPRUCE SHADE: light o.i; available water 12-16%; hu- 

 midity 40-60%; temperature 3O-55 : diphotophyll 250/1.; chlor- 

 enchym (205/1) 3 loose rows prolate palisade cells 50/1; loose sub- 

 globose sponge cells. 



Symphoricarpus oreophila 



GRAVEL: light i; available water 2.5-5.5%; humidity 28-77%; 

 temperature 57~89 : diphotophyll 160/1; epidermis 20/1; cuticle 

 thin with papillae on upper surface; chlorenchym (120/1) i loose 

 row prolate palisade cells 50/1, and a second lacunose row 40/4; 

 loose irregular sponge cells. 



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

 midity 60-85%; temperature 47 -6o, : diphotophyll 100/1; chlor- 

 enchym (60 /i) i lacunose row funnel palisade cells 25 /t ; lacunose 

 oblate sponge cells. 



Gravel C. 120 /* P. 2 rows, 90 A* S. 30 M 



Thicket C. 60 M P. i row, 25 M S. 35 A* 



6oA* i row, 65A* (72%) +SM (16%) 



Light i/ioo; water -f- 15%; humidity +(8-32%) ; temperature 



(I0-20). 



Polygonum convolvulus 



FOOTHILL GRAVEL: light i; available water 2.5-5.5%; humidity 

 28-77%; temperature 57-89 : diphotophyll 175/1; epidermis, up- 

 per 25/1, lower 15 p; cuticle 2/1; chlorenchym (125/1) 1-2 close 

 rows prolate palisade cells, first row 50 /i, second row 25 /i, or one 

 cell replacing two, 75/1; close subglobose sponge cells. (Plate 

 VIII, fig. 2 a.) 



