148 THE BOOK OF EVERGREEXS. 



dwindled into a small bush higher up. Endlicher, Lou- 

 don, and Gordon, all refer it to the Cembra group, but Dr. 

 Hooker has proved it to be identical with P. excelsa of 

 the Himalayas, with rather shorter leaves than those in 

 the Asiatic form. It has been found nowhere between 

 Macedonia and Affghanistan, a distance of 2,200 miles. 



73, P. Pseudo-StrobllS, Lindley. Has much the ap- 

 pearance of the common White Pine, with long, slender, 

 glaucous leaves, and long cones. It is generally found on 

 the higher mountains of Mexico at an elevation of 8,000 

 feet, and forming a tree from 60 to 80 feet in height. 



74, P, Russclliana, Lindley. Another of those 

 beautiful Mexican pines with dense, dark green foliage, 

 and about the same size as the preceding species. ]STot 

 hardy here. 



75, P, StroM for nils, Wislizenus. Is from Northern 

 Mexico, on the higher peaks of the mountains, where it 

 grows to a very large size and attains the height of 

 from 100 to 130 feet. The leaves are short but slender, 

 and of a peculiar light glaucous-green color. 



76, P, tonuifolia, Hentham. Has rather long, slender 

 foliage, of a beautiful glossy-green color, and grows about 

 100 feet in height. It is a native of Guatemala, where it 

 often constitutes whole forests. 



77, P, Wincesteriana, Gordon. Leaves, very long 

 and glaucous, and borne on stout, spreading branches. It 

 is a native of the Saddle Mountain in Mexico, and attains 

 a height of from 60 to 80 feet. 



A doubtful species has been introduced from Mexico 

 under the name of P. Ehreribergii, Endlicher, which is 

 probably but a form of P. leiophytta. 



The following new and rare species will possibly prove 



