1062 The Trees of Great Britain and Ireland 



tropical. At 9000 ft. and below, this pine mingles with the oaks in the more fertile 

 and moister soil ; while above, and more especially on the summit ridges, it some- 

 times forms dense forests. Large trees 3 to 4 ft. in diameter occur above Oaxaca. 1 

 P. Montezuma: was discovered near the city of Mexico in 1803 by Humboldt and 

 Bonpland, who mistook it for the West Indian P. occidentalism, and it was first 

 recognised and described by Lambert in 1832. 



Varieties 



The following account of the principal forms of this species in the wild state is 

 taken from Shaw, who has made a special study of the Mexican pines : 



1. The typical form is sub-tropical, inhabiting the slopes and table-lands between 

 3000 and 6000 ft It is characterised by long leaves, with basal sheaths exceed- 

 ing an inch in length ; by large non-resinous buds ; and by cones 6 to 10 in. long, 

 brown in colour, the apophyses of the scales being elevated, with usually prominent 

 brownish umbos. 



2. Var. Lindleyi, Loudon, Encyc. Trees, 1004, fig. 1882 (1842); Shaw, Pines of 

 Mexico, 22, t. xv. (1909). 



Pinus Lindleyana, Gordon, Pinctum, 229 (1858). 



Leaves often very slender, and drooping like those of P. pseudostrobus, 6 to 10 

 in. long ; cones 4 to 6 in. long ;' apophyses small and numerous, flat or slightly 

 pyramidal, often rectangular and very like var. Hartwegii, but pale brown and not 

 black in colour. 



This variety occurs at altitudes' with a temperate climate. 



3. Var. rudis, Shaw, Pines of Mexico, 22, t. xvi. figs. 1-5, 8 (1909). 



Pinus Montezuma, Gordon, mjourn. Hort. Soc. i. 234 (1846); Masters, in Gard. Chron. viii. 466, 



figs. 91-94 (1890), xv. 273, figs. 29-32 (1894), and xxv. 146, fig. 53 (1899). 

 Pinus rudis, Endlicher, Syn. Conif. 151 (1847). 

 Pinus Ehrenbergii, Endlicher, Syn. Conif. 151 (1847). 

 Pinus Hartwegii, Parlatore, in DC, Prod. xvi. pt. 2, p. 399 (1868) (in part). 



Leaves 4 to 6 in. long. Cones in the first year blue or bluish-black ; when 

 mature, 2\ to 4 in. long, dull, sometimes shining brown. 



This variety, which usually has leaves in fives, though there are occasionally six 

 or seven in a cluster, grows at altitudes with a warm temperate climate, and is con- 

 nected by intermediate forms with var. Lindleyi. 



4. Var. Hartwegii, Engelmann, in Trans. St. Louis Acad. Sc. iv. 177, 181 (1880) ; 

 Shaw, Pines of Mexico, 23, t. xvii. figs. 6, 7 (1909). 



Pinus Hartwegii, Lindley, in Bot. Reg. xxv. Misc. 62 (1839) ; Loudon, Encycl. Trees, 1000, fig. 1875 

 (1842); Kent, Veitch's Man. Conif. 348 (1900); Masters, in Journ. Linn. Soc. {Bot.) xxxv. 

 600 (1904); Clinton-Baker, Illust. Conif i. 24 (1909). 



Pinus Donnell-Smithii, Masters, in Bot. Gaz. xvi. 199 (1891), and mjourn. Linn. Soc. {Bot.) xxxv. 

 600 (1904); Smith, in Bot. Gaz. xix. 13, t. 2 (1894). 



Leaves 3 to 6 in. long, often in threes and fours, as well as in fives. Cones 



1 Cf. Garden and Forest, ix, 102 (1896). 



