NOTES ON A FEW FOSSIL PLANTS FROM THE FORT UNION 

 GROUP OF MONTANA, WITH A DESCRIPTION OF ONE NEW 

 SPECIES. 



BY 



F. H. Kn(iwlton. 

 (With Plates i-ii.) 



The iiiatciial which is the basis for the folio wiiiji" notes was obtained 

 by exchange from the University of Minnesota through Prof. C. W. 

 Hall, the professor of geology in that institution. It consists of a. single 

 slab which bears no less than nine beautifully preserved leaves upon 

 its surfaces. It was collected by Prof. A. D. Meeds, also of the 

 University of Minnesota, during the summer of 1884:, and is labeled 

 '^Southern Montana;" but, from the nature of the matrix as well as 

 from the species of plants preserved upon it, it is more than probable 

 that it came from the Yellowstone Kiver, not far from the town ot 

 Glendive, Mont. 



The first material from this part of tlu^ country was obtained by Dr. 

 F. A'. Hayden, while attached to an expedition made by Lieut. G. K. 

 Warren, of the U. S. Army, in the sunmier of 185(5.* This expedition 

 proceeded from St. Louis to the mouth of the Yellowstone, at which 

 point they arrived July 10, 185G. They intended navigating- the Mis- 

 souri River from this point to Fort Pierre in a small boat ; but, as this 

 could iu)t bo procured for some weeks, they spent the intervening time 

 (until September 1) in exploring the Y'ellowstone as far up as the 

 mouth of the Powder River. 



Plants were also probably obtained during- the years 1859 and 1860 

 by Dr. Hayden, who accompanied the exploring expedition under 

 Capt. (later General) W. F. Raynolds to the YelloAvstone and ]\Iissouri 

 rivers.t The i)lants obtained at these times were described by Dr. J. 

 S. l^ewberry in 1867.| This nuiterial had come, according to Dr. dew- 

 berry, from various points on the Missouri River, at Fort Clarke, Red 

 Spring-, Fort Berthold, and from 100 miles below old F'ort Union, at 



*Preliniinary report of explorations in Nebra8k,a and Dakota in the years 1855, 

 1856, and 1857, by Lieut. G. K. Warren, topographical engineer U. S. Army. Re- 

 print, Washington, 1875. 



tExploration of Yellowstone and Missouri rivers under direction of ('apt. W. F. 

 Raynold.s, 1859-'60. Washington. 1869. 



tLater extinet floras of North America. Annals of the N. Y. Lye. of Nat. Hist., 

 vol. IX, 1868, pp. 27-7G. 



Procociliuus National Mii.seiuii, Vol. XVI — No. 1(21. 



33 

 Proc. N. M. 93 3 



