MEMOIRS OF THE NE^y YORK BOTANICAL GARDEN. 9 



Montana: Bozeman, 1883, T. S. Braudcgcc, 173: Indian 

 Creek, 1886, Tzvccdy. 



Yellowstone Park : Tzvecdx . 



Pinus albicaulis Engelm. in Trans. Acad. Sci. St. Louis, 2: 209 



[Silva, II : 35] ; Pinus fexilis albicaulis Engelm. in Wats. Bot, 



Calif. 2: 124 [Man. R. M. 432]. 



Not ver}' uncommon on high hills or mountain tops at an altitude 

 of 2000 m. or more. On alpine peaks, especially in exposed situa- 

 tions, it becomes much stunted, only a few feet high and with the 

 lower branches spread flat on the ground. In these stunted individuals 

 the wood is very hard owing to the slow growth of the tree. 



Montana: Spanish Basin, June 28, 1897, Rydbcrg tC- Bcs- 

 sex^ 3528; July 16, 1896, Flodnian, 21; Upper Gallatin River, 

 1886, F. T^vccdy. 



Yellom'stone Park : Ticccdx. 



Pinus ponderosa Dough, Lawson, Man., 354 [Silva N. Am. 11 : 77 ; 



Man. R. M. 432; 111. Fl. i : 51 ; Bot. Cal. 2: 125]. 



It seems to be confined to the western slope of the Rockies and is 

 apparently rare in Montana. It grows in rich soil and furnishes ex- 

 cellent lumber. It does not reach an altitude of much more than 

 1000 m. 



Montana: Deer Lodge, August, 1888, F. Tzvccdx^ go. 



Pinus scopulorum (Engelm.) Lemmon, Garden & Forest, 10 : 183 ; 



Pinus ponderosa scopulorum Engelm., Wats. Bot. Cal. 2: 126 



[Silva Am. 11 : 80; Man. R. M., 432 ; 111. Fl. i : 51 ; Bot. Cal. 



2 : 126] . 



I believe that this should rather be regarded as a distinct species, 

 differing from P. ponderosa in the much shorter leaves, which are 

 usually in twos, the short conic-ovoid cone and the rounded crown. 

 Specimens that I have seen of P. fondcrosa have leaves nearly twice 

 as long as those of P. scopulorum, and cones which are elongated 

 ovoid. It is also a much taller tree, growing in rich low soil, while 

 P. scopulorum is always growing on dry hills or mountain sides at 

 an elevation of 1-2000 m. 



Pinus Murrayana " Oreg. Com." in Murra}^ Bot. Exped. Ore., 262 ; 

 Pinus contort a JMurrayana Engelm. in Wats. Bot. Cal. 2: 126 

 [Silva Am. 11 : 90; Man. R. M. 433]. 

 The Lodgepole Pine is the most common pine in the mountain re- 



