THE SILVA OF COLORADO 279 



Partial List of Books and Special Articles Dealing with Colorado Trees 

 Ashe, W. W., "New North American Plants; Some New Species of Crataegus," Ann. 



Rep. No. 24, N. C. Coll. oj Agric. and Mech. Arts, June 30, 1901. 

 Bennett, Mrs. Cora, "List of Colorado Trees," Plant World, Vol. XI, p. 66, 1908. 

 Britton, N. L., North American Trees, pp. 1-894, New York, 1908. 

 Clements, Frederic E., "Formation and Succession Herbaria," University oj Nebraska 



Studies, Vol. IV, pp. 329-355. 

 Cockerell, T. D. A., "The Genus Crataegus in Colorado," University oj Colorado 



Studies, Vol. V, pp. 41-45, 1907. 

 Cooper, W. S., "Alpine Vegetation in the Vicinity of Long's Peak, Colo.," Botanical 



Gazette, Vol. XLV, pp. 319-333, 1908. 

 Coulter, John M., Manual oj Botany oj the Rocky Mountain Region, New York (1882 ?), 



pp. 1-453- 

 Dodds, Gideon S., " Studies of Mesa and Foothill Vegetation; Geology and Physiography 



of the Mesas," University oj Colorado Studies, Vol. VI, pp. 11-19, 1908. 

 Dodds, Gideon S. and Robbins, W. W., "Studies of Mesa and Foothill Vegetation; 



Distribution of Conifers on the Mesas," University oj Colorado Studies, Vol. VI, 



PP- 3*~3 6 > *9°8- 

 Ensign, Edgar T., "Report of Forest Conditions in the Rocky Mountains," Bull. No. 2, 



Forestry Division, Department oj Agriculture (2d ed.), pp. 141-153, 1889. 

 Gannett, Henry, "The Forests of the United States," igth Annual Report U. S. Geol. 



Survey, Part V. pp. 1-26, 1897-98; 20th Annual Report, pp. 1-38, 1898-99; 21 st 



Annual Report, pp. 13-15, 1899-1900. 

 Jack, John G., "List of Trees and Shrubs Observed in the Pike's Peak, Plum Creek 



and South Platte Reserves," 20th Annual Report, U. S. Geol. Survey, Part V., pp. 



109-115, 1898-99; "Pike's Peak, Plum Creek and South Platte Reserves," pp. 



39-108, same publication. 

 Mills, Enos A. and Stone, W. G. M., Forest and Exotic Trees oj Colorado (Pamphlet), 



Denver, 1905. 

 Nelson, Aven, Analytical Key to Some oj the Common Flowering Plants oj the Rocky 



Mountain Region, pp. 1-94, New York, 1902. 



, "Plantae Andrewsii," Proc. Biol. Society Wash., Vol. XVII, pp. 173-180, 1904. 



Ramaley, Francis, "Remarks on the Distribution of Plants in Colorado East of the 



Divide," Postelsia; Yearbook oj the Minn. Seaside Station, pp. 21-53, 1901. 

 , "The Silva of Colorado; Trees of the Pine Family," University oj Colorado Studies, 



Vol. IV, pp. 109-122, 1907; "The Silva of Colorado; Poplars, Aspens and Cotton- 

 woods," Vol. IV, pp. 187-197, 1907; "The Silva of Colorado; Woody Plants of 



Boulder County," Vol. V., pp. 47-63, 1907. 

 , "Plant Zones in the Rocky Mountains of Colorado," Science (New Series), Vol. 



XXVI, pp. 642, 643, 1907. 

 , "Botany of Northeastern Larimer County, Colorado," University oj Colorado 



Studies, Vol. V, pp. 119-131, 1908. 

 , "Studies of Mesa and Foothill Vegetation, Climatology of Mesas," University 



oj Colorado Studies, Vol. VI, pp. 19-31, 1908. 

 , "New Colorado Species of Crataegus," Botanical Gazette, Vol. XLVI, pp. 381-384, 



