160 



A MANUAL OF THE CONIFEK.E. 



America between latitudes 18° and 45°, the most northern species in 

 the eastern part of the Continent being the Pitch Pine, Pinus rigida, 

 and in the western part, P. ponderosa. Of the six species known in the 

 Eastern Continent, three occur in the Himalayan region, and one in 

 the north of China, the other two are insular species, P. canariensis 

 on Mount Teneriffe, and P. insularis in the Philippine Islands. 

 The wood of some of the species is useful for constructive purposes 

 and is known to be very durable, but at present only two supply 

 timber for commerce, the Pitch and southern Eed Pines of North 

 America. The resinous products of the same two, and of P. Tceda, 

 are procured in immense quantities, of which a large proportion is 

 exported to Europe. 



