Crossing the western pines at Placerville, California

Abstract

The results of hybridizing the western pine species by the Institute of Forest Genetics are described and discussed. It has been found that the hard, (yellow) pines can generally be crossed successfully only with similar species native to the same part of the world. In contrast, the soft (white) pines of the Western Hemisphere have been crossed successfully with soft pines of the Eastern Hemisphere. The hybrids produced by the Institute have been found to have value in both the field of forestry and in improving mans environment.

Citation

Critchfield, W. B.; Krugman, S. L. 1967. Crossing the western pines at Placerville, California. University of Washington Arboretum Bulletin, Seattle, Volume XXX No.4, Winter 1967