8o EDITH SCHWARTZ CLEMENTS 



FOOTHILL THICKET: light 0.02; available water 15%; humidity 

 38-80% ; temperature 53-85 : diphotophyll 250/4; epidermis 25 p.; 

 cuticle thin; chlorenchym (200/1) i loose row prolate palisade cells 

 75 /i ; loose subglobose and prolate sponge cells. ( Plate IX, 

 fig- 3 &) 



Half gravel . C. 325 n P. 4 rows, 325 n S. o 



Thicket ..... C. ZOOM _ P. i row, 75 ** _ S. 125 M 

 125 M 3 rows, 250 M (77 % ) + 125 M 



Light 1/50; water + 9%; humidity +(8-25%); temperature 



Helianthus pumilus 



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

 midity 28-77% > temperature 57-89 : staurophyll 425 /*; epidermis 

 30 /i; cuticle 10/1; chlorenchym (365/1) 5-6 loose irregular rows 

 prolate cells 50-75 /i ; transverse bands or isolated areas of water- 

 storage tissue of subglobose and polygonal cells. (Plate IX, 

 fig. 4 a.) 



FOOTHILL THICKET: light 0.0125 ; available water 15% ; humidity 

 38-80%; temperature 53-85: diplophyll 150/1,; epidermis 15/1; 

 cuticle 2/1; chlorenchym (120 /A) 4 rows prolate cells 25-50/1; cen- 

 tral ones somewhat irregular. (Plate IX, fig. 46.) 



Half gravel ... C. 365 M P. 5-6 rows, 365 /* S. o 



Thicket ....... C. 120 /* P. 4 rows, 120 M S. o 



245 A* 1-2 rows, 245 f. (67%) o 



Light 1/80; water +(9.5-12.5%); humidity -(-(3-10%); tem- 

 perature 4. 



Vaguer a stellata 



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

 temperature 5i-76: spongophyll 300/1; epidermis, upper 60 /i, 

 subglobose cells with rudimentary papillae, lower 50/1, wavy with 

 sunken stomata ; cuticle 5 /i ; chlorenchym (190/1) compact glo- 

 bose cells. 



THICKET: light 0.022; available water 15%; humidity 40-70%; 

 temperature 48-72 : spongophyll 250 /i ; epidermis, upper 50 /i 

 elongated cells without papillae, lower 30/1 with stomata half 

 sunken; cuticle 3/1; chlorenchym (170/1) less compact. 



Gravel ................. C. 190 M P. o S. 190 M 



Thicket ................ C. 170 M _ P. o _ S. 170 M _ 



20M O 20M (10%) 



