Naturalisation in Extra-Tropical Countries. 399 



PimiS ponderosa, Douglas.* (P. Benthamiana, Hartweg.) 



Yellow Pitch-Pine or Trucker-Pine. North- Western America. 

 Height of tree often 225 occasionally to 300 feet, with a stem reach- 

 ing 24 feet in circumference. Growth comparatively quick. Thrives 

 best in deep loamy sand, but grows also on dry rocky ridges [Farlow]. 

 Varies in degree of hardiness according to the locality, in which the 

 seeds were obtained [Prof. Th. Meehan]. The wood is yellowish, 

 hard, strong, heavy and durable ; for general purposes it is locally 

 preferred to that of other pines ; also largely used in mining opera- 

 tions. There are fine groves of this tree up to 5,000 feet elevation 

 in California, but the variety P. Engelmanni (Parry) ascends to 

 12,000 feet, therefore to alpine elevations, growing on dry gravelly 

 slopes ; the wood of this variety is light and soft. The bark contains 

 a considerable quantity of tanning substance. Wood pale and soft, 

 neither knotty nor resinous, much esteemed for cabinet-work 

 [Hoopes]; it is of great strength, and used for floors, joists and 

 much other work in carpentry. Gibbons relates, that the wood, with 

 the bark adherent, exposed to the weather, will decay within a year, 

 but that when stripped and covered with soil it is readily persistent. 

 Dr. Kellogg, who aptly calls this tree herculean, saw logs, which had 

 been in the ground twelve years, quite sound. Sapwood very thick. 

 This pine has proved well adapted even for rather dry localities in 

 Victoria, but is there slow of growth. P. latifolia (Sargent) and P. 

 Anacheca (Lemmon) are allied species of Southern Arizona. 



Pinus Pseude-Strobus, Lindley. 



Mexico, up to 10,000 feet. This pine is superior in appearance 

 to any other Mexican pine ; height to about 80 feet. 



Pinus pungens, Michaux. 



South-Eastern States of North-America. Although seldom over 

 50 feet high, this pine has the recommendation of being of remark- 

 ably quick growth, especially in early life. This species is very 

 resinous, also powerfully and pleasantly odorous [Prof. Buckhout] ; 

 should prove of great value. Flower-spikes red; cones large and 

 early formed [Prof. Meehan]. It is not only one of the most 

 beautiful but also one of the hardiest of all Pines. In Finland it 

 bore unscathed a temperature of - 35 F., at which even the hardiest 

 sorts of Apple- and Pear-trees perished [E. Adrian, in " Moeller's 

 Erfurt Gaertner-Zeitung"]. cvaro^ 



Pinus Pyrenaica, Lapey rouse. (P. Brutia, Tenore.) 



In the countries at the Mediterranean Sea, ascending to 5,000 feet. 

 A pine of quick growth, to 80 feet in height ; the wood is pale and 

 dry, almost free from resin, and of considerable value. The tree com- 

 mences to bear fruits in about a dozen years already. 



