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): James W. Hanover
    Date: 1963
    Source: Forest Science. 9(1): 86-95.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (218.42 KB)


    Growth of the shoot apices of 91 trees in a 45-year-old Pinus ponderosa Laws. provenance test was measured periodically with a transit. Analysis of the measurements led to the following conclusions: (1) 19 races of ponderosa pine planted near Priest River, Idaho, showed phenological, morphological, or physiological variation in six characters: date of beginning growth in the spring, date of ending growth, total seasonal elongation, duration of growth, length of dormant terminal bud, and rapidity of growth; (2) the variation described is continuous, although it was not possible to associate an environmental gradient to the variation pattern; (3) all trees except the local Kaniksu source achieved their maximum surge of growth during the same 7-day period, May 20-27, and this response closely paralleled temperature fluctuation; (4) simple correlations among the 19 progenies between total seasonal elongation and either beginning date, relative rapidity, or duration of growth were not significant. Correlation between dormant terminal bud length and total seasonal elongation was strong. Also, bud length was positively correlated with relative rapidity which was negatively correlated with duration of growth.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • 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.


    Hanover, James W. 1963. Geographic variation in ponderosa pine leader growth. Forest Science. 9(1): 86-95.


    ponderosa pine, Pinus ponderosa, growth

    Related Search

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