Surv. Ann. Rpt. 21, Part V-Forest reserves: 

 81-143. 



Community and distribution information. 



PLUMMER, FRED G. 1902. Forest conditions 

 in the Cascade Range, Washington. U.S. Dept. 

 Int., Geol. Surv. Prof. Paper 6, 42 pp. 



Includes distributional map of Engelmann 

 spruce and discusses community composition 

 based on volume (B.M. ). 



PLUMMER, F. G. (From notes by Theodore F. 

 Rixon and Arthur Dodwe 11 . ) 1904. Forest 

 conditions in the Black Mesa Forest Reserve, 

 Arizona. U.S. Dept. Int., Geol. Surv. Prof. 

 Paper 23, 62 pp. 



Discusses community composition based on 

 volume (B. M. ); also growth rate of Engelmann 

 spruce (size-age). 



PLUMMER, FRED G. (See Langille et al.,1903) 



PLUMMER, FRED G. , and M. G. GOWSELL. 

 1904. Forest conditions in the Lincoln For- 

 est Reserve, New Mexico. U.S. Dept. Int. , 

 Geol. Surv. Prof. Paper 33, 47 pp. 



Discusses quantitative community composition 

 based on volume and density. 



PREECE, SHERMAN J. , JR. 1950. Floristic 

 and ecological features of the Raft River 

 Mountains of northwestern Utah. Master's 

 thesis. Univ. Utah, Salt Lake City. 



PRESTON, RICHARD J. , JR. 1947. Rocky 

 Mountain trees. 2d ed. 285 pp. Ames, 

 Iowa: The Iowa State College Press. 



Includes description of Engelmann spruce and 

 general information on Engelmann spruce. 



PRESTON, RICHARD J. , JR. 1961. North 

 American Trees. 2d ed. 395 pp. Ames, 

 Iowa: The Iowa State College Press . 



Includes description of Engelmann spruce and 

 general information on the species. 



PRICE, RAYMOND, and R. B. EVANS. 1937. 

 Climate of the west front of the Wasatch Pla- 

 teau in central Utah. U.S. Monthly Weather 

 Rev. 65: 291-301. 



PRICE, RAYMOND. (See Costello and Price. 

 1939) 



RAGNARSSON, H. (See Bjarnason and 

 Ragnarsson. 1958) 



RALL, GLORIA, and W. G. SOLHEIM. 1961. 

 Melampsoraceae of the Rocky Mountains. 

 Colo.-Wyo. Acad. Sci. 5(2): 45. 



Discusses Chrysomyxa pirolata Wint. and 

 C. weirii Jacks, on Engelmann spruce. 



RAMA LEY, FRANCIS. 1907. Plant zones in 

 the Rocky Mountains of Colorado. Science 

 (N.S.) 26: 642-643. 



RAMALEY, FRANCIS. 1907. The silva of 

 Colorado. I. Trees of the pine family in 

 Colorado. Univ. Colo. Studies 4: 109-122. 



RAMALEY, FRANCIS. 1907. The silva of 

 Colorado. III. Woody plants of Boulder 

 County. Univ. Colo. Studies 5: 47-63. 



RAMALEY, FRANCIS. 1909. The silva of 

 Colorado. IV. Forest formations and forest 

 trees. Univ. Colo. Studies 6: 249-281. 



RAMALEY, FRANCIS. 1920. Subalpine lake- 

 shore vegetation in north-central Colorado. 

 Amer. Jour. Bot. 7: 57-74. 



Zonation and succession. 



RASMUSSEN, D. IRVIN. 1941. Biotic commu- 

 nities of the Kaibab Plateau, Arizona. Ecol. 

 Monog. 11: 229-275. 



RATHBUN, ANNIE E. 1923. Damping-off of 

 taproots of conifers. Phytopathology 13: 385- 

 391. 



RATHBUN-GRAVATT, ANNIE. 1925. Direct 

 inoculation of coniferous stems with damping- 

 off fungi. Jour. Agr. Res. 30: 327-339. 



RATHBUN-GRAVATT, ANNIE. 1931. Germina- 

 tion loss of coniferous seeds due to parasites . 

 Jour. Agr. Res. 42: 71-92. 



RAUP, HUGH M. 1934. Phytogeographic studies 

 in the Peace and Upper Liard River Regions , 

 Canada. 230 pp. Contrib. Arnold Arbore- 

 tum 6. 



Status of Engelmann spruce in these regions 

 is considered. 



26 



