62 EDITH SCHWARTZ CLEMENTS 



ALPINE SPRUCE: light 0.033; humidity 40-55%; temperature 

 40-65 : no variation from the type. 



Light 1/33; water the same; humidity (0-15%) ; temperature 

 10. 



Rydbergia grandiftora 



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

 30-50%; temperature 4O-65 : staurophyll 775 /*; epidermis 25/1,; 

 cuticle 8/4; chlorenchym (725/4) loose prolate cells 60-100 /A. 



ALPINE SPRUCE: light 0.03: chlorenchym lacunose. 



The leaf of the shade-form is much larger than that of the sun- 

 plant, and hence relatively much thinner. The loose arrangement^ 

 of the cells in the sun-leaf is due to the shading effect of the woolly 

 covering of hairs on the leaf. The only change in the shade-leaf is 

 a still looser arrangement of the cells. 



Quercus novimexicana 



HALF GRAVEL NEAR BROOK BANK: light i ; available water 16% ; 

 humidity 30-65%; temperature 5i-76: diphotophyll 200/4; epi- 

 dermis, upper 25/4, lower 10/4; cuticle 2/4; chlorenchym (165/4) I 

 compact row prolate palisade cells 50 /i, and a shorter scattered row 

 35 p.; loose irregular and prolate sponge cells. (Plate VII, fig. 4 a.) 



THICKET: light 0.06; humidity 40-70%; temperature 48-72 : 

 diphotophyll 125/4; epidermis, upper 15/4; cuticle thin; chloren- 

 chym ( 100 /4) i close row prolate palisade cells 35 /4, and the re- 

 mains of a second row 25 /4 ; loose irregular sponge cells. ( Plate 

 VII, fig. 4 &.) 



Half gravel . . C. 165 M P. 2 rows, 85 M S. 80 M 



Thicket C. IOOM P. 2 rows, 60 M S. 40 M 



65 M 25/4 (29%) 20M (25%) 



Light 1/16; water the same; humidity +(5-10%) ; temperature 



-(3-4). 



Valeriana acutiloba 



MEADOW : light i ; available water 9-14% ; humidity 30-65% ; 

 temperature 5O-75 : diphotophyll 400/4; epidermis, upper 25/4, 

 lower 15/4; cuticle 2/4; chlorenchym (360/4) 3-4 loose irregular 

 rows globose to prolate palisade cells 30-50 /4 ; close subglobose and 

 oblate sponge cells. 



SPRUCE: light 0.03 ; available water 12-16% ; humidity 40-70% ; 



