Description of Engelmann spruce and its 

 distribution in Nevada. 



LIVINGSTON, B. E. , and F. SHREVE. 1921. 

 The distribution of vegetation in the United 

 States, as related to climatic conditions. 

 Carnegie Inst. Wash. Pub. 284, 590 pp. 



Lists climatic data. 



LOFGREN, B. G. 1952. A calendar of spring- 

 time for the Rocky Mountain region. Utah 

 Acad. Sci., Arts and Letters Proc. 29:34-38. 



Discusses phenology of blooming in Engel- 

 mann spruce in Utah. 



LOHWAG, K. 1950. Bienenwabenfaule, hervorge- 

 ruien durch Phellinus nigrolimitatus (Romell) 

 B. etG Mitt. 6'st Ges. Holzforsch. 2(3): 22-24. 



Discusses honeycomb rot. 



i 



LONGYEAR , BURTON O. 1914. The evergreens 

 of Colorado. 80 pp. Fort Collins, Colo. 



LONGYEAR , BURTON 0. 1926. The nature of 

 decay in wood. Colo. Agr. Expt. Sta. Bui. 

 307, 58 pp. 



LONGYEAR, BURTON O. 1927. Trees and 



shrubs of the Rocky Mountain region with keys 

 and descriptions for their identification. 244 

 pp. New York: G. P. Putnam's Sons. 



LOVE, L. D. 1955. The effect on streamflow 

 of the killing of spruce and pine by the Engel- 

 mann spruce beetle. Amer. Geophys. Union 

 Trans. 36(1): 113-118. 



LOVE, L. D. , and B. C. GOODELL. 1960. 

 Watershed research on the Fraser Experi- 

 mental Forest. Jour. Forestry 58: 272-275. 



LOVERIDGE, E. W. 1924. Spruce barrens and 

 sheep grazing. Jour. Forestry 22: 806-809. 



Presents autecological information on Engel- 

 mann spruce. 



LOWDERMILK, W. C. 1925. Factors affecting 

 reproduction of Engelmann spruce. Jour. 

 Agr. Res. 30: 995-1009. 



LULL, HOWARD W. , and LINCOLN ELLISON. 

 1950. Precipitation in relation to altitude in 

 central Utah. Ecology 31: 479-484. 



Gives climatic data. 



LUTZ, H. J. , and R. F. CHANDLER. 1947. 

 Forest soils. 514 pp. New York: John Wiley. 



Humus formation. 



MALMSTER, HARRY E. (See Sampson and 

 Malmster. 1926) 



MARCH, R. E. (See Pearson and March. 1935) 



MARCO, HERBERT F. 1931. Needle structure 

 as an aid in distinguishing Colorado blue 

 spruce from Engelmann spruce. Bot. Gaz. 

 92: 446-449. 



MARCO, HERBERT F. 1939. The anatomy of 

 spruce needles. Jour. Agr. Res. 58: 357- 

 368. 



MARKWARDT, L. J. 1930. Comparative 

 strength properties of woods grown in the 

 United States. U.S. Dept. Agr. Tech. Bui. 

 158, 38 pp. 



MARR, JOHN W. 1958. Lee slope stands in the 

 upper part of the forest -tundra ecotone on 

 Niwot Ridge, Boulder County, Colorado. Jour. 

 Colo.-Wyo. Acad. Sci. 4(10): 41. (Abstract.) 



Includes community description and snow 

 cover characteristics. 



MARR, JOHN W. 1959. Forms of tree islands 

 in alpine tundra. Jour. Colo.-Wyo. Acad. 

 Sci. 4(11): 34. (Abstract.) 



Hypothesis attempting to explain the develop- 

 ment, maintenance, and modification of tree 

 species in "tree islands" in alpine tundra. 



MARR, JOHN W. 1961. Ecosystems of the east 

 slope of the Front Range in Colorado. Univ. 

 Colo. Studies, Biol. Ser. 8, 134 pp. 



MASSE Y, C. L. 1953. Engelmann spruce 

 beetle. Amer. Forests 59: 31. 



MASSE Y, C. L. 1956. Nematode parasites and 

 associates of the Engelmann spruce beetle 

 (Dendroctonus engelmanni Hopk.). Helmin- 

 thological Soc. Wash. 23: 14-24. 



MASSEY, C. L. , R. D. CHISHOLM, and N. D. 

 WYGANT. 1953. Chemical control of the 

 Engelmann spruce beetle in Colorado. Jour. 

 Econ. Ent. 46: 951-955. 



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