LITERATURE 177 



27. HoDEON, E. R. and Foster, J. H. EnDrelmann spruce 

 in the Rocky Mountains. _ Circ. For. Serv. J]'. S. Dept. Agric. 

 170: 1-23. S 1910. 



28. Knowlton, F. H. A catalo^e of the Cretaceous and 

 Tertiary plants of North America. Bull. IT. S. Geol. Surv. 

 152: 1-247. 1898. 



29. Leiberg, John B. Notes on the flora of western Da- 

 kota and eastern Montana adjacent to the Northern Pacific 

 Railroad. Bot. Gaz. 9:103-107,126-129. 1884.' 



30. . General report on a botanical survey of 



the Coeur d'Alene Mountains in Idaho during the summer of 

 1895. Cont. U. S. Nat. Herb. 5 : 1-85. pi. 1. Ja 1897. 



31. . Forest conditions in the Absaroka divi- 



.sion of the Yellowstone Forest Reserve, Montana, and the Liv- 

 ingston and Big Timber Quadrangles. Prof. Paper U. S. Geol. 

 Surv. 29 : 1-148. pi. 1-2 1904. 



32. . Forest conditions in the Little Belt Moun- 

 tains Forest Reserve, Montana, and the Little Belt Mountains 

 Quadrangle. Prof. Paper IT. S. Geol. Surv. 30 : 1-75. pi. 1-2. 

 1904. 



33. Lesqubrbux, Leo. Contributions to the fossil floras 

 ■of the western territories. III. Cretaceous and Tertiary Floras. 

 Rep. U. S. Geol. Surv. Terr. 8 : 1-283. pi. 1-59. 1883. 



34. Lindgben, WjVLdEiMAB. A geological reconnaissance 

 across the Bitter Root Range and Clearwater Mountains in Mon- 

 tana and Idaho. Prof. Paper U. S. Geol. Surv. 27 : 1-123. pi. 

 1-15. 1904. 



35. Livingston, B. E. Temperature coefficient in plant 

 geography and climatology. Bot. Gaz. 56 : 349-375. 1913. 



36. Lyall, David. Account of the botanical collections 

 made by David Lyall, M.D., R.N., F.L.S., Surgeon and Naturalist 

 to the North American Boundary Commission. Journ. Linn. 

 Soe. 7: 124-144. 1864. 



37. MacDougaij, D. T. The auxo-thermal integration of 

 climatic complexes. Am. Journ. Bot. 1 : 186-193. pi. 17-18. 

 Ap. 1914. 



38. Marshall, R. B. Results of .spirit leveling in Mon- 

 tana. Bull. U. S. Geol. Surv. 482:1-154. pi. 1. 1911. 



39. Mason, D. T. The life history of the lodgepole pine in 



