THE NEWER EVERGREEN ORNAMENTAL TREES. 521 



P. mitis (Yellow pine). This well-known variety, so com- 

 mon once in many portions of the United States, re- 

 P tadaf 111 * quires no description. It has been singularly con- 

 P. royiei. founded with many other varieties, and has only 

 P. lutea. recently been distributed by the East India Com- 

 pany, as a new species, under the name of P. royiei, which 

 farther experience shows clearly was the common American 

 yellow pine. 



-P. monticola (the Mountain pine). We have had this tree 



P. Lambcrtiana. out for several years. It is quite as hardy as 



P. brevifoiia. our "\y n ite pine, and so closely resembling it as 



hardly to pass as distinct. It grows as tall as the White pine, 



but has a denser head, and shorter and more glaucous foliage 



found on Trinity Mountain, in Northern California. 



P. Montezuma (Montezuma Mexican pine). This fine 

 variety has stood out with us several winters, though somewhat 

 protected. It is found on the mountains of Mexico, at an 

 elevation of eleven thousand feet, growing forty to sixty feet 

 high, with a spreading head. This does not appear as yet to 

 be in any of the American collections besides our own. 



P. Mugho (the Mugan pine). A small tree, thirty feet high, 



p. syivestris Mugho. from the Alps, perfectly hardy everywhere, 



p.Mughus. but not very at t r active. There are four 



varieties, all small, and Mugho nana (Knee pine), not more 



than three feet high. 



P. nivea (the Snow pine) Is only a variety of our common 

 White pine (P. strobus), with the under part of the leaves, 

 silvery quite as hardy as its parent. 



P. pahistris. We have already described as Australis. 

 P. patula (the Wide-spreading Mexican pine). Of all the 

 pines which we have ever seen, this is beyond measure the 

 most graceful and charming, not only in its growth and habit, 

 a representation of which is given in Fig. 95 but in the 

 nature, softness, and color of its leaves. It resembles a 

 beautiful, delicate green fountain of spun glass, and has a parti- 

 color, like shot-silk, which catches the sunlight almost like a 

 kaleidoscope. The leaves resemble the silk of maize, being 

 as soft and delicate, and not unlike it in color. Although 

 found in the colder regions of Mexico, on the Real del Monte 



