Naturalisation in Extra- Tropical Countries 353. 



Pinus Hudsonica, Poiret. (P. Banksiana, Lambert.) 



Grey Pine. Colder parts of North-America, both eastern and 

 western, np to 64 north-latitude. Height of tree to as much as 

 100 feet ; in the cold north only a shrub. Its wood is light, tough, 

 resinous and easily worked ; locally used for railway-ties. Extends 

 further north than any other pine in America [Dawson and 

 Macoun]. Should prove valuable for alpine forests. 



Pinus inops, Solander. 



Eastern North- America. The Jersey-Pine. A tree, content with 

 barren soil, attaining a height of 40 feet, available for fixing drift- 

 sand on coasts. Easily disseminated. Remarkably rich in resin, 

 hence to be classed with pines most desirable for sanitary planta- 

 tions. Wood reddish-yellow. P. Virginiana (Miller) is by far the 

 eldest name. 



Pinus insigrnis, Douglas.* (P. radiata, D. Don.) 



California. A splendid darli-green pine, fully to 100 feet high, 

 with a straight stem, occasionally 8 feet in diameter. It is the 

 quickest-growing of all pines, a seedling one year old being strong- 

 enough for final transplantation ; it has been noticed to grow fully 

 5 feet annually in light soil near Melbourne. Mr. J. Dickinson 

 found it to attain a height of 70 feet, with a stem-girth of 5 feet, 

 in 13 years at Port Phillip. Although Cupressus macrocarpa grows 

 nearly as fast, that tree is not so indifferent to soil as P. insignis, 

 which will brave even stagnant humidity in stiif soil. Preferable 

 in mild climes for street-planting to trees with annually deciduous 

 leaves, as the small yearly fall of foliage does not choke gutters 

 and drains, nor becomes so offensive in moist decay ; thus even of 

 sanitary effect. Never introduced into Victoria as a timber-tree, 

 but to impart quickly and uninterruptedly a magnificent verdure 

 to towns and landscapes, and to afford early shelter. According to 

 W. I. Winter it will endure unhurt exceptional exposure to 118 F. 

 in the shade. Even more apt to catch fire than most pines. In 

 . the United Kingdom it suffers greatly from the attacks of the 

 Pine-Beetle, Hylurgus piniperda [Lawson]. The wood is of inferior 

 technic value ; but this tree can be utilized for obtaining tar and 

 pitch. It bears exposure to the sea at the very edge of the coast. 

 Produces fruit-cones only at somewhat advanced age. Mr. J. 

 Kruse, on the author's suggestion, subjected the foliage to distilla- 

 tion, obtaining oil in O'Ol quantity of 0'845 specific gravity, of 

 293 F. boiling point, and of a pleasant penetrating odor, reminding 

 of Geneva-gin. Prof. Don having named and described this tree 

 under two names simultaneously, the later name, given by Douglas, 

 may remain adopted. 



Pinus Jefireyi, Murray. 



California. A pine, to 150 feet in height ; stem-diameter to 4 

 feet. Hardy at Christiania, Norway. Recommended particularly 



