ADAPTATION OF CONIFERS 49 



The mountain or western white pine, Pinus monticola, 

 native from British Cokimbia to northern Cahfornia and 

 Montana, bears a strong resemblance to the eastern white pine. 

 The leaves are a little stiffer and shorter than in the latter. It 

 grows very slowly in the East, and the largest specimen is 

 perhaps twenty-five feet tall. It never shows the slightest 

 signs of injury from cold. The habit is broadly pyramidal, 

 and it appears to be a good plant for small gardens. 



The single-leaf, or pinon pine, Pinus cembroides var. mono- 

 phylla, is a native of dry regions from Utah, Nevada, and Ari- 

 zona. It forms a dense broad pyramid about ten feet tall. It 

 always attracts attention from connoisseurs on conifers because 

 of its distinctive characters. The foliage is bluish-green. 



Amongst the three-leaved pines the most useful species is 

 the bull pine, Pinus ponderosa, native from British Columbia 

 to western Texas. There are individuals of this handsome pine 

 in Rochester, New York, fifty to sixty years old and sixty to 

 seventy feet tall, in perfect health. It passes through the 

 severest winters without injury. The branches are spreading 

 and variously curving. The long handsome leaves are thickly 

 disposed on the branches, and the whole aspect when well 

 developed is very dignified. The bull pine seems most at home 

 in a well-drained moist soil at the base of a slope or in a ravine. 

 The variety pendula has very long drooping leaves, with the 

 branches slightly pendulous, and is very distinctive. There is 

 an excellent example of this pendulous variety on the grounds 

 of the late W. C. Barry, forty feet tall. A variety known as 

 scopulorum from the Rocky Mountains is smaller than the type. 

 Plants in the Pinetum are now five to six feet tall and look 

 very promising. 



Jeffrey pine, Pinus Jeffreyi, from southern Oregon to 

 California, is much rarer in cultivation than the bull pine. 



