. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. 220 R. J. STEINHOFF. Figure 5. Mixed stand contain- ing Pinus flexilis (arrow) near Billings, Montana (photo courtesy J. W. Andresen). Limber pine has been planted in arboreta and experimental plots but no plantings have been made on a commercial scale. t A group of 4 trees at the Institute of Forest Genetics in Placerville, California, averaged 42 feet tall and 11 inches in diameter at 32 years of age (Institute of Forest Genetics, Placerv
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. 220 R. J. STEINHOFF. Figure 5. Mixed stand contain- ing Pinus flexilis (arrow) near Billings, Montana (photo courtesy J. W. Andresen). Limber pine has been planted in arboreta and experimental plots but no plantings have been made on a commercial scale. t A group of 4 trees at the Institute of Forest Genetics in Placerville, California, averaged 42 feet tall and 11 inches in diameter at 32 years of age (Institute of Forest Genetics, Placerville, Calif., unpublished data) . Wright (1958) reported that some limber pines in Philadelphia were growing faster than eastern white pines {Pinus strobus L.) planted nearby. A 24-year-old tree in Wooster, Ohio, is 37 feet tall and 6 inches in diameter (H. B. Kriebel, personal communication). Several provenance test plantations recently have been established in the north-central United States from stock grown at Michigan State University. While many of the trees present in arboreta and parks are nultistemmed, others indicate that trees suited to lumber production could be obtained with proper selection. The species appears to be moderately to highly susceptible to the white pine blister rust disease (.Bingham2) . Limber pine has been successfully crossed with P. strobiformis and P. monticola (Little and Righter, 1965); and with P. ayacahuite , Pinus qriffithii McClell. (syn. P. wallichiana Jacks.), and P. strobus (Wright, 1959). A cross with F. albicaulis produced two seedlings which gave indication of being hybrids but they were accidentally destroyed before verification could be completed (W. B. Critchfield, personal communication). The P. flexilis x P. griffithii hybrids at Placerville were 11 feet tall at 10 years (Little and Righter, 1965).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - co
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Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
