CHAP. CXIII. 



CONI FERiE. PI'NUS. 



2245 



terior side ; smooth, with verj indistinctly serrated margins ; sheaths short 

 of a dull blackish colour, and lace- .,.^\\ ^ISo 



rated or torn at their extremities," 

 Lawsoii's Manual, p. 355.) The 

 timber is said to be so heavy as al- 

 most to sink in water. The tree is 

 found to be quite hardy, and of rapid 

 growth, both in the climate of Lon- 

 don and of Edinburgh. P. ponderosa 

 is a native of the north-west coast of 

 North America, on the banks of the 

 Spokan and Flathead rivers, and on 

 the Kettle Falls of the Columbia, 

 abundantly. It was discovered by 

 Douglas, and sent by him to the 

 Horticultural Society in 1826. A 

 number of plants were raised from 

 seeds in that year, and distributed : 

 the largest of these we believe to be 

 that in the Horticultural Society's 

 Garden, of which/g. 2136. is a por- 

 trait, to the scale of 1 in. to 4 ft. 

 The tree at Dropmore was, in 1837, 

 9 ft. high. Both this tree, and that in the Horticultural Society's Garden, 

 are very subject to the attacks of the Hylurgus piniperda, already described, 

 p. 214-].; and the specimen 

 sent home by Douglas is 

 remarkable for having a large 

 tuft, among the leaves, of a 

 parasitic plant attached to it ; 

 of a portion of which fig. 

 2137. is a specimen slightly 

 magnified. This plant, the 

 Arceuthobium Oxycedri of 

 Bieb., Spreng. Sj/st., iii. p. 

 901. ; Fiscum Oxycedri Dec, 

 Hook. Fl. Bor. Amer., p. 371. 

 t. 99.; was found by Dou- 

 glas on Pinus ponderosa, on 

 the west side of the Rocky 

 Mountains ; and both by Dou- 

 glas and Drummond "on P. 

 Banks2a?ia, from the Spokan 

 river on the west side of the 

 Rocky Mountains, in lat. 47°, 

 to the Rocky Mountains, and 

 thence to Hudson's Bay on 

 the east, in lat. 57°. Mr. 

 Douglas entertained an idea 

 that the specimens in his 

 herbarium of this curious para- 

 site, found on P. ponderosa, 

 were different from those found 



on P. Banksiawa ; but the only • r i . ^ 



difference consists in the latter being loaded with female, the former 

 with male, flowers, which certainly gives a very different appearance to the 

 extremities of the numerous branches. It is remarkable too, that all Mr. 

 Drummond's specimens (and they were all found upon P. Banksz«n«) 



7 F 4 



