lO MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



gions of Western Montana and the Yellowstone Park, and next to the 

 Douglas Fir or Red Fir the most important lumber tree of the region. 

 As it generally is of a rather small size it is more used for wood, 

 railroad ties, and at the mines than for lumber. The areas ravaged 

 by forest fires are generally reforested by this pine alone, and the 

 young trees come up so close together that they form thickets that 

 can scarcely be penetrated. In the Yellowstone Park, the species 

 reaches an altitude of 2500 m. 



Montana: Spanish Basin, June 30, 1897, J^xdbcrg c£- Bcsscy^ 

 3j2^- Highwood Caiion, 1888, R. S. Williaiiis, 717: Gallatin Co., 

 1886, Tweedy. 



Yellowstone Park: Tzceedv; Lone Star Geyser, August 7, 

 Rydbcrg & Bessev, Sj2j : Yellowstone Lake, August 12, 3^26; 

 Yellowstone Falls, August 14, 3327. 



Pinus contorta Dougl., Loudon, Arb. Frut. 4: 2292 [Man. R. M. 



432 ; Silva Am. 11 : 89 : Bot. Cal. 2 : 126] . 



This species is reported as growing in Montana by Sargent, Sud- 

 worth and others. It is doubtful, however, if the true -P. eoiilorta 

 really grows in the state. That species is a native of the sandy 

 dunes of the Pacific coast, from northern California to Alaska. On 

 dry hills, at an altitude of about 2000 m., there is growing in Mon- 

 tana a straggling tree, bearing cones w^hen only a meter or two high. 

 As these trees bear cones that are very oblique and often remain 

 closed for years, characters that well agree with the description of 

 P. contorta., they have generally been regarded as belonging to that 

 species. To this form belong the specimens cited below'. I think, 

 how'ever, that they may just as well represent a depauperate form of 

 P. Miirrayana. 



Montana : Spanish Basin, June 16 and 28, 1897, Rydbcrg- 1(- ^('5- 

 s^y^ 3522 and 3323. 

 * Larix occidentalis Nutt. Sylva 3 : 143 ; Bot. Cal. 2 : 112. 



It resembles the eastern Larch or Tamarack, but has cones about 

 twice as large. It grows in cold swamps in the northwestern part 

 of the state. 



Montana: Mt. Haggin, Deer Lodge Co., 1888, P. Tzceedy, gi ; 

 Missoula, 1898, WiUiaius & Griffith. 



Picca -pung o nG . Engelm. in London Gard. Chron. 1879: 334 [Man. 

 '^^•^^■^'"^ R. M. 431] ; Abies Mcnziesii Engelm. Am. Journ. Sci. II.,. 



34 : 330. Not Lindl. 



