1? FOREST OISTEIBUTIOX 



Sheplicrdia ai'genfea Xiitt. 



Populiis trichocarpa Torr & Gray 



Pinus ponderosa Dougl. 



Juniperus communis L. 



Junipcrus horizontalis Moench. 



From the time this collection was made it was nearly 30 

 years before another observation was made upon the flora of the 

 State of ^Montana, unless we except the visit of David Douglas 

 who at least approached the western boundary in 1S26. In 

 1S33, however, Alexander Phillip Maximilian (Jtl), Prince of 

 Xeuweid. made notes on the vegetation from Fort Union, near 

 the mouth of the Yellowstone, up the ^Missouri Eiver to the 

 mouth of the ]Marias. In the ravines at Fort. Union, he observtd 

 thickets of oak, elm, box elder, and bird cherry (probably Primus 

 Virginiana L). On the banks of the Missouri were poplars, 

 willows, ash, elm. box elder, etc.. with a thick undergrowth of 

 hazel, roses and blackberry. The occurrence of oak, elm. and 

 ash is to be expected along the ^lissouri bottoms but the present 

 bourdary of ^Montana is about the western limit of their range. 

 It is doubtful if they ha"\'e since been reported in Montana. 



"Wyeth's journeys to Oregon begun, in 1S32 and occupying 

 about three years, (45 j. followed a route via (rreen River and 

 the Snake south of the region here considered, but approa(?hing 

 the western border in Eastern Idaho. On the second of tliese 

 trips (1S34), he was accompanied by Thomas Xuttall. There 

 appears to be no record of his collections on this trip. "Wyeth, 

 however, on his return from the first expedition, is said to nave 

 ascended the Clark's Fork of the Columbia, thence southward 

 via the Bitter Root and the Big Hole to the Salmon River in 

 Idaho, and from there across to the Big Hurn and the Yellow- 

 stone. His collections were descri'ied by X'uttall and are de- 

 posited in the Academy of Sciences in Philadelphia and the 

 New York Botanical Carden. 



Charles A. (TP\er (19) in 1S44 traveled over part of the 

 same route from Clark's Fork to the Yellowstone and the plants 

 which he collected were taken to Europe, determined by Hooker 

 and distributed. At an earlier date, we have a record of his 

 survey of the vegetation of the ^lissouri River region in the 

 Dakotas in which he lists a number of plants common to ^Montana. 



