1914] 
white oaks; 
which is subtropical. 
GROOM—TRACHEID-CALIBER 
TABLE IV 
AMERICAN DECIDUOUS SPECIES OF QUERCUS 
B, black oaks; all are warm temperate excepting Q. lobata, 
WIDTH OF WIDEST SPRING 
VESSELS 
Atlantic 
Pacific 
HaBITAT 
Q. Garryana....|.. 
fe opata:.......|.. 
Q. obtusiloba.. . . 
Q. macrocarpa.. . 
Q. Macdonaldi 
Q. californica. As 
0.362 
©.372 
©.412 
0,412 
0.419 
a 
oe ee eele ree ne 
ee ee 
Dry habitat; Vancouver to Califor- 
dry gravelly 
also between 
sh 
hence tending to be sub-evergreen. 
ry sandy — or on har 
e dryness and 
bb ie ee ies dere ;Cape 
ei o Florida, Mississippi, "eras, 
is’) 
° 
mr 
Variable as ae a showing 
power of endurin 
hwest regi 
which is wide, oo from 
— Scotia and Ontario to Min- 
, Texas, etc. 
Islands off California 
egon, coast ranges of Califor- 
000 ft. in western slopes 
- Mississippi, T etc. 
Good wet — (aot ’ swamp) at the 
edges of s margins ns of 
rivers; Cinade * Missouri, Vir- 
ginia, Arkan 
