486 BOTANICAL GAZETTE 
[DECEMBER 
AP 
Acer—soil 
| 
\ 
Abies—light 
Abies—soil 
Abies—temperature 
ay 
EEN 
NOE NIN OND 
Ne ~ 8 rs Kt Acer—water 
LS] N 
AKPREDLS 
. S Arce. <j Abies—water 
\ ts," xR 4 
TL SERS 
* N> . 
i) SES] A cer—temperature 
os be L +1 Acer—light 
iS 
Ne de 
\ ue 
‘ Cae eet 
a 
~*~ 
sy 
re 85 Cte ub ah ; ieee 
Fic. 7 
impo: 
light; Wack I areas barred, the bars being 
tolerance; barred areas represent areas of competition. 
d Acer saccharum shown by super- 
cca areas of tolerance toward factors of temperature, water, 
similar to radii representing sp 58 
soil, and 
of 
