THE TRUE PINES. 263 



slightly recurved. Scales, thickened at the base, irregularly 

 four-sided, with an elevated ridge across the centre, highest in 

 the middle, and very much depressed at the base, rather more 

 than an inch broad, and nine-tenths of an inch long, with a very 

 small, projecting, little, recurved point on the summit. 



A tree growing eighty feet high, easily distinguished by its 

 tufted leaves, found growing on the western declivity of the 

 Mountains of Ixtacihuatl, in Mexico. 



No. 141. PiNUS SPINOSA, Roezl, the Spiny-coned Mexican 



Pine. 



(Discovered by M. Roezl in 1856-7.) 



Leaves, in fives, three-edged, curved, and from eight to nine 

 inches long ; sheaths, nearly an inch long, and silky. Cones, 

 recurved, four inches long, and one inch and a quarter in 

 diameter. Scales, irregularly rhomboid, slightly keeled trans- 

 versely across the centre, highest in the middle, and flattened 

 at the base ; protuberance elevated, each terminating in a sharp 

 recurved spine at the point. 



A very regular-shaped tree, growing from eighty to ninety 

 feet high, having a fine appearance on account of its fine curving 

 foliage and regular appearance. 



It is found on the Amecameca Mountains, in Mexico, at an 

 elevation of 8,000 or 9,000 feet. 



No. 142. PiNUS Thelemanni,* Roezl, Thelemann's Mexican, 



Pine. 



(Discovered by M. Roezl in 1856-7.) 



Leaves, in fives, slender, three-sided, and from eight to nine 

 inches long ; sheaths, nearly one inch long, and silky. Cones, 

 pyramidal, six inches long, and two inches in diameter. 

 Scales, rhomboid, rounded towards the summit, transversely 

 keeled, three-quarters of an inch broad, and half an inch long ; 

 protuberance depressed, ashy-grey coloured, and without any 

 terminal point. 



