190 PINUS 



in twenty-one years from planting, had reached well over 60 ft. in height. 

 $ut it is of no value in a climate like that of Kew, where the trees turn 

 a sort of foxy-brown almost every winter, and are occasionally killed 

 outright by cold. This tree, by its rich green leaves without any 

 trace of the typical greyness of pines, by its persistent leaf-sheaths and 

 long persisting cones, is unmistakable among three-leaved pines. 



P. RESINOSA, Solander. RED PINE. 



A tree 50 to 70 ft. high in this country, rarely twice as high in nature, 

 with somewhat pendulous branches ; young shoots deep yellowish brown, 

 not downy ; winter buds resinous, conical, in. long. Leaves in pairs, 

 semi-terete ; 5 to 6J ins. long, falling the fourth year, and leaving the 

 branchlets rough with the remains of the prominences on which each bundle 

 was seated ; dark lustrous green, minutely toothed on the margin ; densely 

 crowded on the branchlets, so that each year's crop is continuous with the 

 preceding one ; leaf-sheaths to % in. long, persistent. Cones egg-shaped, 

 2 to 2j ins. long, I to i ins. wide before opening ; pale shining brown, 

 scarcely stalked ; scales unarmed. 



Native of Eastern N. America from Nova Scotia to Pennsylvania ; 

 introduced in 1756 by the Duke of Northumberland. It is a handsome 

 pine as seen in its native country and yields a useful timber, but with us 

 is inferior as a garden tree to both Thunbergii and Laricio, of which it 

 may be said to be the American representative. It is only likely to be 

 mistaken for Laricio, which has a denser, more horizontal branching. 

 The best ready distinction between the two is in the leaf-sheath of 

 P. Laricio being only two-thirds as long as that of P. resinosa. A tree 

 at Bayfordbury is well over 50 ft. high. I saw this bearing cones in 1908. 



P. RIGIDA, Miller. NORTHERN PITCH PlNE. 



A tree reaching about 80 ft. in height, with a trunk 2 to 3 ft. thick, often 

 sending out adventitious shoots ; young shoots smooth, pale brown ; buds 

 cylindrical, resinous. Leaves in threes, falling the third year ; 3 to 4^ ins. 

 long, rigid, twisted, dark green, margins minutely toothed ; leaf-sheath \ to 

 \ in. long. Cones very variable, ranging from conical to almost globose, and 

 from i to 3^ ins. long ; occasionally small and numerous in clusters, long 

 persisting; scales terminated by a short prickle. 



Native of Eastern N. America from New Brunswick to Georgia ; introduced 

 in the early eighteenth century. In a few places it has made a fine tree. At 

 Arley Castle, near Bewdley, there are three fine specimens, the tallest of 

 which is 79 ft. high ; and according to Elwes, there is one at Dropmore 84 ft. 

 high. As a rule it is rather a scrubby tree of little ornament, very well 

 distinguished by the small branches springing directly from the trunk. Some 

 trees produce these twigs so freely that the trunks are almost covered with 

 foliage, but they never get very large, and mostly die after a few years. 



P. SEROTINA, Michaux. Pond Pine. This is closely allied to P. rigida, 

 and seems to differ chiefly in its greater length of leaf (twice as long). It 

 seems doubtful if it be in cultivation in this country, and in any case it is tender, 

 and only likely to succeed in the south-western counties. Native of the south- 

 eastern United States from N. Carolina to Florida. 



P. SABINIANA, Douglas. DIGGER PINE. 



A tree 40 to 50, occasionally 90 ft. high, of curiously thin habit ; young 

 shoots blue-white, not downy, with the leaves clustered at the apex only, the 

 major part naked except for the awl-shaped scale-leaves, in. long. Leaves 



