PINACE.E 421 



shape, ovoid conic to cylindrical, 2J-10 in. long, stalked ; scales 

 obovate oblong, 1 in. or more long, exposed portion dull yellow, 

 reddish or dark brown to black, flat or swollen, transversely 

 ridged, with a minute, deciduous prickle. Seed ovate, brownish, 

 mottled with black, I in. long, wing narrow, 1 in. or more long. 



Var. Hartwegii, Engelmann. 



P. Hartwegii, Lindley. 



Leaves often in bundles of 3-4, greyish green or glaucous in 

 colour. Cones similar to those of var. rudis, but dark brown or 

 almost black when mature. Native of Central Mexico in colder 

 regions and at higher altitudes than other forms. 



Var. Lindleyi, Loudon. 



P. Linclleyana, Roezl. 



Leaves very slender and drooping, 6-10 in. long. Cones 4-6 

 in. long, with the scales flat or slightly pyramidal above, pale 

 brown in colour. Occurring in temperate regions. 



Var. rudis, Shaw. (Fig. 93.) 



Leaves occasionally 6-7 in a cluster, 4-6 in. long. Cones blue 

 or bluish black at first, becoming dull or shining brown when 

 mature, 2-2 1 in. long. Native of warm, temperate regions. It 

 is connected by intermediate forms with var. Lindleyi. 



Among the five-leaved pines P. Montez^imce may generally be 

 recognized by its long, spreading or drooping leaves, persistent 

 leaf -sheaths and large buds. 



The species is common as a wild tree in the mountains of 

 Mexico, where it occurs in tropical and temperate regions at 

 altitudes between 4,000-12,000 ft. It is a very variable species 

 and many of its forms have been described as species,^ but 

 these have no real distinctions and are connected by numerous 

 intermediates. 



The timber of P. Montezumce is unknown in the British Isles 

 save for small specimens. It appears to be in general use in Mexico 

 and to be one of the chief timbers of the country. There is also 

 a small resin industry in Mexico, but it is doubtful from which 

 pine the resin is obtained or whether it is procured from more 

 than one species. In 1920 Mexico exported 28,693 gallons of 

 turpentine to the United States. ^ 



P. Montezumce is represented in the British Isles by var. 

 Hartwegii and perhaps by others. It can only be depended upon 

 in the S. and S.W. counties, for even its hardiest forms are 



^ Roezl, Cat. des Graines de Conif. Mexicains (1851) describes 82 Mexican 

 pines, only about six of which according to Shaw are distinct species. All of 

 these had been previously described. 



^ Commerce Reports, June 24, 1921, 1739. 



