Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Alex C. Wiedenhoeft; Regis B. Miller; Terra J. Theim
    Date: 2003
    Source: IAWA journal. Vol. 24, no. 3 (2003): Pages 257-267
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (187 KB)


    Three microscopic characters were evaluated for the identification of Pinus contorta and Pinus ponderosa. The tangential diameter of the resin canals, including the epithelium, was compared to the tangential diameter of the entire resin canal complex. The latter measurement was shown to give diagnostic results for these species. Data from the examination of ray composition do not support previously published methods for separating P. contorta and P. ponderosa. The presence or absence of small elongate crystals in the subsidiary parenchyma of the resin canal complexes was shown to be the most powerful diagnostic character for separating the wood of these species.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Wiedenhoeft, Alex C.; Miller, Regis B.; Theim, Terra J. 2003. Analysis of three microscopic characters for separating the wood of Pinus contorta and P. ponderosa. IAWA journal. Vol. 24, no. 3 (2003): Pages 257-267


    Resin canal, wood anatomy, wood identification, Pinus contorta, Pinus ponderosa

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page