50 EDITH SCHWARTZ CLEMENTS 



Spruce ...... C. 75 A* P. 1-2 rows, 45 /* S. 30 A* 



Spruce ...... C. 55 A* _ P. I row, 20 A* _ S. 351* _ 



20A* 25/4 (55%) + SA* (16%) 



Light J ; other factors unchanged except for a probable slight in- 

 crease in moisture due to deeper shade. 



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

 65% ; temperature 55-76 : diphotophyll 225 p. ; upper cuticle 2-3 p. ; 

 chlorenchym (190^) 2 compact rows prolate and prolobate palisade 

 cells 40 fi, and a transition row between palisade and sponge ; irregu- 

 lar closer sponge cells. 



Spruce . . . C. 75 A* P. 1-2 rows, 45 A* S. 30 M 



Gravel ____ C. 190 M _ P. 2 rows, 80 A* _ S. IIOA* 



+ H5M + 35M (80%) +80 M (266 %T 



Light 33/1 ; water (9-5- IO -5%) '> humidity (4-10%) ; tem- 

 perature + (4-7). 



Fragaria bracteata 



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

 40-70% ; temperature 48-72 : diphotophyll 90^; epidermis wavy, 

 upper 20 p., lower io/u,; cuticle thin; chlorenchym (6o/*) i close 

 row funnel palisade cells 25 /*, and a second shorter scattered row 

 15 /u,; loose oblate sponge cells. 



SPRUCE SHADE: light o.i ; available water 8-10% : diphotophyll 

 125 /* ; epidermis 20 /*; chlorenchym (85^) 2 compact rows narrow 

 prolate palisade cells 25 p. ; globose sponge cells. 



Spruce ........ C. 60 A* P. 2 rows, 40 A* S. 20 M 



Spruce ........ C. 85 M _ P. 2 rows, 50 M _ S. 35 M 



+IOA* (25%) +15/4 (75%) 



Light 3/1 ; water (4-6%) ; probably a little warmer and less 

 humid, but exact amounts unknown. 



THICKET SHADE: light 0.014; available water 19% : diphotophyll 

 125/4; epidermis, upper 25/4, lower 20 /u,; chlorenchym (So p.) i 

 loose row funnel palisade cells 30 ju, ; lacunose oblate sponge cells. 



Spruce ..... C. 60 /* P. 2 rows, 40 A* S. 20 M 



Thicket ..... C. 80 /* _ P. i row, 30 M _ S. 50 M _ 

 + 20 A* i row, 10 A* (25%) +30 A* (150%) 



Light \; water -f- (3-7%) ; other factors practically the same. 

 AWNING SHADE (seedling): light 0.0016: diphotophyll 



