Bui. 1131, U. S. Dept. of Agriculture. 



Plate III 



Frost Injury to Pinus densiflora. 



Effect upon Pinus densiflora of a late March frost occurring after the development of many of the 1921 

 shoots had been initiated, showing the characteristic permanent distortion of the terminal shoot 

 and three of the five lateral shoots. Photographed September 30. (Two-thirds natural size.) 



