CONTENTS 



INTRODUCTION 1 



MATERIALS AND METHODS 1 



RESULTS AND DISCUSSION 2 



Yield of Cones 2 



Yield of Seeds Per Cone 6 



Yields From Wind-, Cross-, and 



Self- Pollinated Cones 6 



SUMMARY AND CONCLUSIONS 11 



LITERATURE CITED 12 



ABSTRACT 



Eighteen years of cone and seed yields from 179 30- to 

 50-year-old western white pines (Pinus monticola Dougl.) 

 representative of 13 geographic localities were compared. 

 Each tree averaged 28 cones per tree, and each cone con- 

 tained about 104 filled seeds. However, not only was 

 annual cone production highly variable, but geographic lo- 

 calities and individual trees varied greatly in productivity 

 within a given year. Recognition of these components of 

 variation in cone production for western white pine can 

 lead to maximal efficiency in cone collection. 



