184 A MANUAL OP THE CONlFEBiB. 



free from knots, and very easily worked. It finds its way into every 

 carpentering establishment in Great Britain." * 



In England, the principal, if not the only use of Pinus Strobus in 

 planting, is for the park and landscape, and for mixing with other 

 trees in forming belts, screens, &c. Experience has shown, that although 

 it will grow in all ordinary soils, its rate of growth, which averages 

 about 12 or 13 feet in ten years, is not only much slower than that 

 of several of the two-leaved Pines, but also the timber of home-grown 

 trees is less valuable, which is doubtless owing to climatal causes. 



The specific name Strobus, appears to have been taken by Linnaeus, 

 from Pliny, t who mentions a tree called Strobus, indigenous to Car- 

 mania, a province of ancient Persia, where it was sought after for- 

 fumigating or incense. It is not known what tree this was. P. Strobus 

 is called the "Weymouth Pine, from having been extensively planted 

 by Lord Weymouth, at Longleat, in Wiltshire, soon after its intro- 

 duction, and whence seeds were afterwards distributed. 



The following PincSj all natives of the higher mountain regions 

 of Mixico, were introduced to British Gardens by the Horticultural 

 Society of London, through their collector, Hartweg, who discovered 

 them in 1838-9:— 



Pinus Ayacahuite.— A large tree, attaining a height of 100 feet. 

 It has whorled spreading branches, and long lax, slender, glaucous 

 leaves, and much resembles P. Strobus in habit and appearance. It 

 is a native of the mountains in northern Mexico, where it occurs at 

 elevations between 7,000 and 11,000 feet. It rarely escapes injury 

 during severe weather in England, even in sheltered situations. 



Pinus Devoniana— A fine tree, 60 to 70 feet high with spreading 

 branches and deep green leaves, 8 to 10 inches long, with sheaths 

 1 inch long. It was discovered by Hartweg, on the mountains in the 

 neighbourhood of Oaxaca, at an elevation of 8,000 feet, and named 

 by Dr. Lindley in compliment to the Duke of Devonshire. It closely 

 resembles P. Montezumce, of which it is probably only a variety. 

 It is rather tender. 



Pinus Hartwegii. — A medium-sized tree, with thick crooked branches 

 and light green leaves. It is found on the mountains in the neighbour- 

 hood of Oaxaca, where it was discovered by Hartweg in 1839. It was 

 named by Dr. Lindley after its discoverer. It is somewhat hardier than 

 most of the Mexican Pines, but liable to injury in severe weather. 



* Mr. Rowan's Emigrant and Sportsman in Canada. 



t Petunt et in Carmanos arborem strobum ad suffltus perfuaam vineo palmes accendentes 

 xh., c. 17. ' 



