No.\.\ i. kay am> SOOKEB "N nil. ROCKY MOUNTAIN FLORA, 15 



■tange, as it extends fnm the Golf of Saint Lawrence to thai of Mexico, 

 and northwestward into British Columbia, while soutHwestward it 

 rencaon Utah, in the Northern Rocky Mountains il is associated with 

 J.iabina; in the Southern with the following Bpecies. Invaluable as 



tod is the tree is not large or abundant enough in the region under 

 consideration t<» be of much account 



,/// 'Ktalis and -/. OaHforniea^ the Western Bed Cedars, 



have also a great range, a dubious variety of the former (too neai b 

 Mexican species being the Oedar of Western Texas. The two in their 

 various farms ; u»- \.-i\ striking an<l characteristic trees of tin* dry inte- 

 rior region. Like the eastern Bpecies, they are sometimes mere shrubs, 

 sometimes Large but low n 



lipervs pm-lniplihm, named for its very thick" hark, which is likened 

 to that of a Pine or of White Oak. takes the place of these species in 



Western New Mexico and adjacent parts of Arizona. 



These are tin- trees Of which the t ■ d. and which arc 



the sole reliance for construction and fuel. Of their value to the 

 country, of the importance to the country of their preservation, of the 

 sad inroads that are made upon them by fires, and of their rapid con- 

 sumption by the inhabitants, especially in mining, it is superfluous here 



e few angiospermons trees are of quite inferior importance, and the 

 folio the only considerable ones : 



cocarpus ledifolius, called Mountain Mahogany, is peculiar to the 

 mountains of the ( Ireal Basin and of it^ borders. It is commonly a mere 

 shrub, but at between 6,000 and 8,000 fi «-t on the mountain sides it forms 

 of 20 to 10 feet in height and a trunk which has in some 

 iched the girth of ; feet at The wood --i- of a bright 



mahog tor, and susceptible of a beautiful polish, is exceedingly 



hard, heavy, and close grained, but very brittle, and so Liable to heart 

 e and difficult t<> work as to i> ( - i:^,-ie<s in the ait-. It is. however, 

 iployed for the bearings of machinery, where it i> found to 

 well as metal." •• It i- ties Professor Sargent, from 



whom t . taken, "probably the onlj North American 



d which is heavier than wal ity being deter- 



mined by him To he 1.117 and it- I !i so -low that "an exam 



matioii ol I specimens from one to two hundred years old shows 



imnal in i -d only one sixtieth of an inch in thickne 



rundo aa the Ash-leaved Maple, is found in valleys along 



• r-courses in the southern the Rocky Mountains, and ai 



;i- the Wahsatch, and south and Arizona, while in 



California it is represented b . llied Bpecies. it a ex- 



i ida and the bordei - some- 



times made fi 



More important ami conspicuo e Poplars, which, 



