PREFACE. IX 



The following is a list of the collections seen by me, and the 

 institutions in which they are deposited : 



Lewis & Clark, 1S03-6, Academy of Sciences, Philadelphia.* 



Nathaniel B. Wyeth, 1832, Academy of Sciences, Philadelphia, type 

 set ; Columbia University, duplicate set. 



Thomas Nuttall, 1834, Columbia University, a few duplicates.* 



Charles A. Geyer, 1843-4, Columbia University, a few duplicates.* 



Dr. Suckley, Steven's Expedition, 1853-4, Columbia University, dupli- 

 cate set.* 



Dr. Cooper, 1854, Columbia University, type set (?). 



John Pearsall, Mullan's Expedition, 1S5S-62, Columbia University, 

 type set. 



Dr. Lyall, 1S61, Gray Herbarium, a few duplicates.* 



Hayden Survey, 1859-60, Columbia University, a few duplicates.* 



Hayden Survey, 1871, New York Botanical Garden, duplicate set; some 

 of the type set in Dr. Porter's Herbarium. 



Hayden Survey, 1872, College of Pharmacy, partial duplicate set. 



C. C. Parry, Jones' Expedition, 1S73, Columbia University, complete 

 duplicate set.* 



Sereno Watson, 18S0, Gray Herbarium, type set, but only partially 

 examined. 



William M. Canby, 18S2-3, College of Pharmacy, type set. 



F. Lamson-Scribxer, 1883, College of Pharmacy, duplicate set.f 



Frank Tweedy, 1884-91, Tweedy's private herbarium, type set; Columbia 

 University and College of Pharmacy, duplicates. 



P. A. Rydberg and C. L. Shear, 1895, Division of Agrostology, Wash- 

 ington, type set; Columbia University and New York Botanical 

 Garden, duplicate sets. 



P. A. Rydberg, 1896, Division of Agrostology, type set; New York 

 Botanical Garden, complete duplicate set. 



J. H. Flodman, 1896, New York Botanical Garden, type set. 



Rydberg & Bessey, 1897, New York Botanical Garden, type set. 



Williams & Griffith, 1898, New York Botanical Garden, some dupli- 

 cates. 



World's Fair Set, Montana College of Agriculture and Mechanical Arts, 

 Bozeman, type set. 



Montana Ladies' World's Fair Set, Montana College of Agriculture 

 and Mechanical Arts, Bozeman, type set. 



*Ouly very small parts of these collections were made in Montana or the Yellow- 

 stone Park. 



t The greater part of the type set was destroyed by fire a few years ago. 



