CHAP. CXIII.

coni'fer/e. pi'nus.

2245

2135

terior side; smooth, with very indistinctly serrated margins; sheaths shortof a dull blackish colour, and lace-rated or torn at their extremities.”

Lawson's Manual, p. 355.) Thetimber is said to be so heavy as al-most to sink in water. The tree isfound to be quite hardy, and of rapidgrowth, both in the climate of Lon-don and of Edinburgh . P. ponderosais a native of the north-west coast ofNorth America , on the banks of theSpokan and Flathead rivers, and onthe Kettle Falls of the Columbia,abundantly. It was discovered byDouglas, and sent by him to theHorticultural Society in 1826. Anumber of plants were raised fromseeds in that year, and distributed:the largest of these we believe to bethat in the Horticultural Society’sGarden, of which fig. 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. 2141.; and the specimensent home by Douglas isremarkable for having a largetuft, among the leaves, of aparasitic plant attached to it;of a portion of which fig.

2137. is a specimen slightlymagnified. This plant, theArceuthobium Oxycedri ofBieb., Spreng. Syst., iii. p.

901.; Fiscum Oxycedri Dec.,

Hook. FI. Bor. Amer., p. 971.t. 99.; was found by Dou-glas on -Pinus ponderosa, onthe west side of the RockyMountains ; and both by Dou-glas and Drummond “on P.

Banksmaa, from the Spokanriver on the west side of theRocky Mountains , in lat. 47°,to the Rocky Mountains , andthence to Hudson’s Bay onthe east, in lat. 57°. Mr.

Douglas entertained an ideathat the specimens in hisherbarium of this curious para-site, found on P. ponderosa,were different from those foundon P. Banksidjta ; but the onlydifference consists in the latter being loaded with female, the formerwith male, flowers, which certainly gives a very different appearance to theextremities of the numerous branches. It is remarkable too, that all Mr.Drummond’s specimens (and they were all found upon P. Banksidaa)

7 F 4