FORESTS AND TREES OF NORTH AMERICA. 249 



Pike's Expedition to Rocky Mountains in 1808, 181-2. 



Pacific Railroad Explorations, vols. I to VII, and Reports on Botany by Drs. Torrey and 

 Gray, Newberry, Autisell, Bigelow, Cooper, and Suckley. 



Collections in Smithsonian Institution from Nebraska, Kansas, California, Oregon, and Wash- 

 ington Territory, and other regions west of the Mississippi river. 



Hooker's Flora Boreali-Americana, 2 vols, quarto. 



Fauna Boreali-Americana, preface, by Dr. Richardson. 



Darlington, Flora Cestrica. 



Emerson, Trees and Shrubs of Massachusetts. 



Lapham, Plants of Wisconsin. 



Hoy, Trees of Wisconsin. 



Wailes, Agriculture and Geology of Mississippi. 



Kitchell and Cook, Geology of Capo May county, New Jersey. 



Thompson, Natural History of Vermont. 



Ray Society Eeports on Botany, 1849, including Geyers' Notes of Journey across North 

 America. 



Agassiz, Lake Superior. (Narrative by J. E. Cabot.) 



Torrey, Botany of New York. 



Swallow, Geology of Missouri, 1st and 2d Reports, (list of trees.) 



Hayden, Trees of Nebraska, in Warren's Explorations, 1859. 



Elliott's Botany of Southern States, 1824. 



Russell, Climate and Agriculture of United States, 1857. 



Richardson's Journeys in Search of Franklin. 



Reports on Botany. 



Darby, Botany of Southern States. 



Geyer, Botany of Oregon, in Hooker's Lond. Jour. Bot. 



Gray, (Asa,) Statistics of Flora of Northern United States, in Sill. Jour., 2d series, vol. 

 XXH, 185G, and XXIII, 1857. 



Anderson, Synopsis of North American Willows, from Proc. Amer. Acad. Arts and Sciences 

 IV, 1858. 



Rafinescjue, Florula Ludoviciana. 



Trans. Amer. Phil. Soc., 2d series, vol. 3, Dr. Pickering on Distribution of Plants of United 

 States. 



Ibid, Nuttall on Plants of Arkansas. 



Lieutenant Colonel Kearny and Major J. D. Graham, Top. Eng., East Boundary of Texas, 

 with detailed maps, 1840. 



Brevet Captain J. C. Fremont, Top. Eng., Explorations, 1842, 1843, 1844. 



Major W. H. Emory, Top. Eng., Explorations of, 1846, 1847. 



Lieutenant J. H. Simpson, Top. Eng., Canadian river and Navajo country, 1849, 



Captain H. Stansbury, Top. Eng., Exp. to Salt Lake, 1849, 1850. 



Lieutenant Cohmel Johnston, Top. Eug., Explorations in Texas, 1849, 1850, 1851. 



Captains Sitgreaves and Woodruff, Top. Engs., Boundaries of Creek country, (36° 30', de- 

 viled maps,) 1850, 1851. 



Captain L. Sitgreaves' Eipl. Zuni and Colorado rivers, 1851, 



Captain R. B. Marcy, U. S A., Expl. of Rod river of Texas, 18.52. 



Lieutenant G. K. Warren, Top. Eug., Explorations in Minnesota and Nebraska, 1855, 

 1856, 1857. 



Major W. H. Emory, U. S. A., Survey of Mexican Boundary, 1849, 1850, 1852, 1853, 1854, 

 1855. 



J. R. Bartlett, U. S. Comm., Survey of Mexican Boundary, 1S49, 1850, 18o2, 1853, 1854, 

 1855. 



Personal narrative. 



A. D. Bache, Supt. Coast Survey, maps of Pacific coast and along Gulf of Mexico. 



United States Land Office Surveys of Michigan, Indiana, Illinois, Wisconsin, Minnesota 



issouri and Arkansas, up to spring of 1858. 



Journey to Pembina, on Red river of Minnesota, 1857, by R Kennicott, of Illinois. 



Nicollet's Report Expl. Upper Mississippi, 1843. 



List of Plants by Dr. Torrey and C. Geyer. 



Eoemcr's Texas, 1849. 



A. Von Humboldt on Distribution of Plants, translated in Edin. Philoa. Jour., vol. VI, 

 VII, 1820. 



Many other works have been consulted which were not made note of at the time, and also 

 results given of personal explorations and observations made from Maine to Virginia, ami 

 across the continent through NeTjraska, Oregon, Washington, and California. 



