372 PINUS KESINOSA. 



London under the name of P. insiynis, which remained an herbarium 

 name only till it was taken up by London in his " Arboretum et 

 Fruticetum Britannicum," published in 1838. In the meantime 

 Dr. Thomas Coulter had brought home specimens which were described 

 by David Don as P. radiata in a paper read before the Linnean 

 Society in June, 1835, and published in the Transactions of the Society 

 in the following year. Don's name therefore has priority of publication, 

 and it has, moreover, been in use occasionally ever since. 



The value of Pinus radiata as a subject for British arboriculture is 

 restricted to the area which may be roughly denned to be that part 

 of England south of the Thames and west of the Severn, Ireland 

 generally, and the south-western counties of Scotland. Within this 

 area it is one of the stateliest and most ornamental of all Pines ; 

 beyond it, it is liable to be injured by severe frosts, and is often 

 killed by them. Trees from 60 to 70 feet high are not uncommon 

 in Devon and Cornwall and in Ireland, but the " leader " of the older 

 trees has, in most instances, ceased to ascend, and in consequence 

 they are becoming round- or flat-topped, and the lowermost branches are 

 becoming effete or have been cast off altogether.* P. radiata is liable 

 to the attacks of the Pine-beetle, Myelophilus piniperda, the effects of 

 which are generally counteracted by the luxuriant growth of the tree. 



Pinus radiata is much cultivated in Australia and New Zealand, 

 where its growth is still more rapid than in Great Britain. In south 

 California it is planted for fixing the sand dunes. 



Pinus resinosa. 



A tall tree 60100 or more feet high, with a trunk 2 2 -5 feet 

 in diameter near the base, covered with red bark often split into 

 irregular patches 1- 3 inches in diameter. Branches stout, more or 

 less pendulous ; in old age confined to the top of the tree, forming 

 a round-topped head. Branchlets stout and glabrous, with ~pale 

 orange-brown bark. Buds conic, acute, 0'5 0'75 inch long, pale 

 chestnut-brown. Leaves geminate, persistent three years, somewhat 

 close-set, 4'5 5*5 inches long, slender, semi-terete, with slightly scabrous 

 margins, mostly inclined towards the shoot, at first glaucous green > 

 becoming darker with age ; basal sheath greyish brown, about an inch 

 long, much shorter, darker and lacerated after the first year. Staminate 

 flowers in short, dense clusters, sub-cylindric, 0'5 0'75 inch long, pale 

 brown tinged with dull rose-purple, and surrounded at the base by 

 about six involucral bracts. Cones ovoid-conic, obtuse, about 2*5 inches 

 long, and 1'25 inch in diameter above the base ; scales broadly obloi^ 

 075 inch long, with a rather thin rhomboidal apophysis marked with 

 a transverse keel and unarmed central umbo. Seeds small with 

 an oblong wing obliquely rounded at the apex. 



* Among the many fine specimens of Pinus radiata to be seen within the area mentioned 

 above, mention may be made of those at the Royal residence, Osborne. Isle of Wight ; 

 Boconnoc, Carclew and Menabilly in Cornwall ; at Bodorgan in Anglesea ; at Eastnor Castle, 

 Herefordshire ; Monk Coniston, Lancashire ; and Bowood Park, Wiltshire. In Ireland at 

 Powerscourt and Charleville, Co. Wicklow; St. Anne's, Clontarf; Haniwood, Co. Meath ; 

 Fota Island near Cork ; Adare Manor, Limerick, etc. 



