Resources

Benson, Lyman. Plant Classification. 2nd ed. Toronto: D.C. Heath and Company, 1979.

"Christmas FYI." MrChristmasTree.com. Balsam Creek Lane Tree Farm. 11 Apr. 2009 <http://www.mrchristmastree.com/2f_didyouknow.htm>.

"Colorado Blue Spruce." Picea pungens. The Ohio State University. 14 Apr. 2009 <http://hcs.osu.edu/hcs/TMI/Plantlist/pi_ngens.html>.

Crane, Peter, and Paul Kenrick0. "Embryophytes." Tolweb.org. Tree of Life Project. 7 Apr. 2009 <http://tolweb.org/Embryophytes/20582>.

Farabee, M. J. "What is Photosynthesis?" Photosynthesis. 6 June 2007. Estrella Mountain Community College. 14 Apr. 2009 <http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html#What%20is%20Photosynthesis>.

Heywood, V.H., and Chant, S.R., eds. Popular Encyclopedia of Plants. London: Equinox Limited, 1982.

Knebel, Larissa, and Thomas R. Wentworth. "Influence of Fire and Southern Pine Beetle on Pine-Dominated Forests in The Linville Gorge Wilderness, North Carolina." Castanea 74 (2009): 214-25. Www.bioone.org. 8 June 2007. BioOne. 14 Apr. 2009 <http://www.bioone.org/doi/full/10.2179/06-18.1?prevSearch=%5Bfulltext%3A+picea+pungens%5D+AND+%5Bpublisher%3A+bioone%5D&searchHistoryKey&cookieSet=1>.

Ledig, F. Thomas, Paul D. Hodgskiss, and David R. Johnson. “The structure of genetic diversity in Engelmann spruce and a comparison with blue spruce.” Canadian Journal of Botany 84.12 (Dec. 2006): 1806-1828. Academic Search Premier. EBSCO. 26 Mar. 2009 http://search.ebscohost.com. Keyword: Picea pungens.

Mauseth, James D. Botany: An Introduction to Plant Biology. Vol. 2. Boston: Jones and Bartlett, 1998.

Nzokou, Pascal, and Paligwende Nikiema. “The Influence of Three Plant Growth Regulators on Susceptibility to Cold Injury Following Warm Winter Spells in Fraser Fir and Colorado Blue Spruce.” HortScience 43.3 (June 2008): 742-746. Academic Search Premier. EBSCO. 26 Mar. 2009 https://libweb.uwlax.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=32600974&site=ehost-live&scope=site.

"Plants." Biology4Kids. Ed. Andrew Rader. 2009. Biology for Kids. 11 Apr. 2009 <http://www.biology4kids.com/files/plants_xylemphloem.html>.

Shuster, James. "Cytospora Canker of Spruce." University of Illinois Extension: Focus on Plant Problems. 2009. Illinois.edu. 11 Apr. 2009 <http://urbanext.illinois.edu/focus/cytosporacanker.html>.

"Tree of Life." Conifer Images. 2004. Tree of Life Project. <http://tolweb.org/images/Conifers/20634>.