72 EDITH SCHWARTZ CLEMENTS 



Aralia nudicaulis 



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

 temperature 55-76 : diphotophyll 110/1; epidermis IO/A; cuticle 

 thin; chlorenchym (90/4) I close row prolate palisade cells 35/1; 

 close oblate sponge cells. 



THICKET : light 0.014 ; available water 19% ; humidity 40-70% ; 

 temperature 48-72 : diphotophyll 75/1; epidermis 5-10 /*.; chlor- 

 enchym (60/1) i loose row funnel palisade cells 25/1; lacunose ob- 

 late sponge cells. 



Gravel C. 90 /* P. i row, 35 f* S. 55 /* 



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



30 M 10 / (28%) 20/t (36%) 



Light 1/7; water +(13.5-16.5%); humidity +(5-10%); tem- 

 perature (4-7)- 



Artemisia gnaphalodes 



FOOTHILL MESA : light i ; available water 2-4% ; humidity 28- 

 77%; temperature 57-89 : diphotophyll 175 /*; epidermis, upper 

 25 /i, lower 20 /i, lower surface undulating ; cuticle, upper 4 p, lower 

 2 p; chlorenchym (130/4) i compact row prolate palisade cells 65 /x; 

 compact globose sponge cells, lower ones prolate. 



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

 38-80%; temperature 53-85 : diphotophyll 150/1; epidermis, 

 upper 20 p., lower 15 ft, lower surface undulating; cuticle, upper 

 3 /i, lower thin; chlorenchym (115/4) i close row prolate palisade 

 cells 50^1; close subglobose sponge cells. 



Mesa C. ijo/t P. i row, 651* S. 65/4 



Thicket C. 115/4 P. I row, 50 /* S. 65 M 



IS/* IS/* (23%) o 



Light 1/80; water +(7-9%); humidity +(3-10%); tempera- 

 ture 4. 



Artemisia ludoviciana 



FOOTHILL MESA : light i ; available water 2-4% ; humidity 28- 

 77%; temperature 57-89 : diplophyll 190/1; surfaces undulating; 

 epidermis, upper 25/4, lower 15/4; cuticle, upper 5/1, lower 2/4; 

 chlorenchym (150/1) i compact row prolate palisade cells 75/4 

 next to upper epidermis, and i loose row oblobate cells 40/1 next 

 to lower epidermis ; central close globose sponge cells. (Plate VIII, 

 fig. 6 a.) 



