40 BOTANICAL INFORMATION. 



groves, on sandstone rocks, later I met with it again on the 



slopes of the high plateaux at the upper Colorado, it grows 



on an average, 8 feet high, and has, even in shady situations, a 



glaucous colour. Here already occurs Mahonia aquifolia, so 



common in Upper Oregon, as also Arctostaphylos Uva Ursi, 



Espeletia helianthoides, Gaillardia pinnatifida, Artemisia Lew- 



isii. Further: Graminea 11 and 12, Juncus IS, Helianthea 



33 and 34, My osotis Virginiana, Hyssopus, 87, Rubus Nutkanus 



(14S), Avena? 189, Helianthoidea 204, Epilobium latifolium 



(angustifolium ?), E. coloratura, Gymnandra, 230, Geum, 251, 



Alismacea? 271, Amelanchier Canadensis, Eriogonum, 403, 



Streptopus, 611, Salix, 636, Pulmonaria ? 485, Senecio, 4S4, 



Saxifraga granulatus ? and others. Passed through the narrow 



belts of two or three species of elegant Calochortus (68 and 



609), Senecio integerrimus, Astragalus succulentus, trichocalyx, 



Aiheropogon oligostachyon, Erigeron glabellum, Polygonea, 



162, Lewisia rediviva, Bartonia, 265, Phaca, 3, Epilobium, 4, 



Oxytropis, 5, (Enothera, 38, Cantua, 42, Marsilea, 450, Lu~ 



pinus, 29. 



It now remains for me to describe the botany of the 

 detached granite mountains, which is very easily done, there 

 being very little vegetation on them. It was not in my power 

 to visit the Wind River and Rocky Mountain Chain ; for a 

 description of which, I refer to the account given by 

 Captain Fremont, in his report of 1842, with the notes of 

 Dr. Torrey. 



The first point east, on this route, of the detached granite 

 mountains, is Rock Independence, at the Sweet Water 

 River, so named because the first explorers spent here the 

 anniversary day of the independence of their country. The 

 Rock is the great « stranger's book," where every visitor may 

 write his name, and many have done so. The traveller feels 

 a certain joy when he recognizes the names of dear 

 friends, among thousands, who encamped there before 

 him. Here appear a few scattered dwarf Pinus ponderosa; 

 Juniperus Andina, Ribes irriguum, and R. resinosum, Pursh, 

 are quite common. Groves of Populus betuUefolia make 



