THE TRUE PINES. 311 



No. 77. Pinus Loudoniana, Gordon, Mr. Loudon's Pine. 



Syn. Pinus Ayacahuite macrocarpa, Hartiveg. 

 colorada, Ehrenberg. 



sp. like Ayacahuite, Loudon. 

 Popocatepetl!, Roezl. 

 Don Pedri, Roezl. 



Leaves in fives, and like those of Pinus Ayacahuite, very 

 glaucous, but much stouter, from live to six inches long, and 

 angular on the inner face. Sheaths composed of very long, 

 linear, acute-pointed scales, which soon curl up and fall off. 

 Branches in whorls, slender and horizontal, lateral ones long, 

 very slender, little divided and drooping. Cones, quite straight, 

 and tapering to the point, from twelve to fourteen inches long, 

 and from three to four inches in diameter a little above the 

 base. Scales from one inch and three-quarters to two inches 

 broad, and one inch long in the exposed part ; slightly curved 

 at the points in the upper ones, but much more so on those 

 near the base of the cone, where they are sometimes quite re- 

 flected, and much narrower ; thickest in the centre, and taper- 

 ing to a broad more or less reflexed point, with several elevated 

 lines on the surface. Seeds very large, with broad ample 

 wings, one inch long. 



A noble tree, rivalling Pinus Lambertiana, and growing 140 

 feet high, with a straight stem, furnished with long slender 

 branches in regular whorls and pendent branchlets, two or 

 three feet long. 



It is found on the east side of Popocatepetl, in Mexico, at 

 an elevation of from 11,000 to 12,000 feet ; also at " Tenango," 

 a beautiful tree, with large pendent cones at the points of the 

 shoots, very much resembling Pineapples, and called by the 

 Mexicans, " Pina." It is also called " Ayacahuite Colorado," or 

 Red Ayacahuite by the inhabitants, on account of its highly- 

 esteemed timber, which is of excellent quality. 



