. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. 228 R. J. STEINHOFF. Figure 11. A 65-year-old, thinned, western white pine stand, Deception Creek Experimental Forest ( Forest Service photo) DISCUSSION Western North America has a variety of white pines with rather broad geographic ranges. It would seem, therefore, that most of these species would be adapted to quite a wide range of conditions but this is not necessarily so. Much of the variation which might be expected to accom- pany
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. 228 R. J. STEINHOFF. Figure 11. A 65-year-old, thinned, western white pine stand, Deception Creek Experimental Forest ( Forest Service photo) DISCUSSION Western North America has a variety of white pines with rather broad geographic ranges. It would seem, therefore, that most of these species would be adapted to quite a wide range of conditions but this is not necessarily so. Much of the variation which might be expected to accom- pany latitudinal displacement within species probably is offset by compensating elevational shifts. Climatic variables such as length of growing season and amount of annual precipitation are often quite similar, even between widely separated stands. Several of the species grow on the same sites, especially near the extremes of their ranges. For example, western white pine and whitebark pine grow together in several areas as do whitebark and limber pines. Sugar pine and western white pine grow together in Oregon and California. Western white, whitebark, limber, and foxtail pines grow within a few yards of one another in the Sierra Nevada Mountains, and sugar pine grows only a few miles away. SUMMARY The foxtail pines comprise two species both of which grow in western North America. Pinus halfouvixia is restricted to two areas in California while P. aristata is widely distributed. Neither species is commercially important but both have high esthetic value and may be useful for water- shed protection or avalanche Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Atlantic Treaty Organization; International Union of Forestry Research Organizations; United States. Forest Service; University of Idaho. Wash
Size: 1819px × 1374px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
