USDA Forest Service
 

Pacific Southwest Research Station

 

Pacific Southwest Research Station
800 Buchanan Street
West Annex Building
Albany, CA 94710-0011

(510) 559-6300

United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Publications and Products

Order a printed copy
of this publication.

Research Paper

Title: Local and regional variation in the monoterpenes of ponderosa pine wood oleoresin

Author: Smith, R.H.; Peloquin, R.L.; Passof, P.C.

Date: 1969

Source: Res. Paper PSW-RP-056. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station; 14 p.

Station ID: RP-PSW-056

Description: A gas chromatographic analysis of the mono-terpenes of 927 ponderosa pines, representing to some degree a major portion of the species' range, showed considerable local and regional diversity in composition. Five major monoterpenes— α-pinene, β-pinene, 3-carene, myrcene, and limonene—were analyzed. There is some evidence to support the establishment of at least eight regional types of ponderosa pine, and a further breakdown of these into four major and four minor ones on the basis of greater differences. More meaningful than regional types may be individual tree variants; at least 25 of these have been identified. However, despite regional types and the large number of individual variants, trees with similar composition were found in all regions except southern Arizona. Limonene had the largest coefficient of variation in 48 of 74 plots. Neither elevation nor age of the tree had an apparent effect on composition. Minor components found were heptane, α-thujene, camphene, sabinene, unde-cane, β-phellandrene, -γ-terpinene, and terpinolene; however, only the last three were commonly found.

View and Print this Publication (927 KB)

Citation

Smith, R.H.; Peloquin, R.L.; Passof, P.C.  1969.  Local and regional variation in the monoterpenes of ponderosa pine wood oleoresin  Res. Paper PSW-RP-056. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station; 14 p.

Last Modified: Nov 18, 2013 12:45:34 PM