178 
“BRONzING” 
“Bronzing” of foliage is a form of sun-scorch pale dn by 
the occurrence ot a re code brews or Drones. color of the caf. 
It is produced 
during dry ia iods. In bronzing, the cells furthest yeneued 
from the eae tissues of the veins and veinlets of 
the water-conducting channels may remain alive. These groups 
of dead cells give the leaf the peculiar color from which this type 
of sun-scald takes its name. The location of some trees is such 
that they are subjected to sun-scorch or bronzing during every 
dry period 
The burning which has occurred so extensively to conifers 
g the past 
n e low tempera Ww nein ollowed it un- 
ae tedly caused the injury. Tn me instances the leaves were 
eae scorched and the a. buds and wood untouched, 
while in others the burning was more severe and the wood was 
injured to such an extent that it died back as the warm weather 
approached. 
his burning appears to have been associated with excessive 
er from tim 
those regarded as tender, and plants under trees seem in many 
