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HEAVY- WOODED PINE. 
PINUS ponderosa, foliis ternis prcdongis tortuosis , vaginis brevibus , 
antherarum crista rotundata Integra , strobilis avatis refiexis , squamis 
compressis subquadrangulatis apice spinulosis recurvatis. 
Pinus ponderosa. Douglas, MSS. Loddig. Catal. ed. 1836. Loudon, 
Arboretum Brittanieum, vol. 4, p. 2243, fig. 2132 and 2134. 
This species was discovered by the late Mr. Douglas, 
on the banks of the Spokam and Flat-Head rivers, and 
near the Kettle Falls of the Columbia, in the territory of 
Oregon, where it grows in abundance. The same species, 
I believe, grows also near Monterey in Upper California, 
where it likewise gives support to that curious parasite the 
Arceuthobium *americanum, which exists on one of Doug- 
las’s specimens. 
The timber is said to be so heavy as almost to sink in 
water. The tree has proved quite hardy and of rapid 
growth both in the climate of London and of Edinburgh. 
It has a very elegant appearance, even as a young tree, 
and seems to surpass all others in strength and luxuriance. 
The leaves are disposed in parallel spirals, from 9 to 1 1 
inches long, 3 in a sheath, which is from half an inch to I 
inch in length. The scales of the cone terminate in flat- 
tened processes scarcely ribbed in any direction. In the 
centre of the process is a protuberance, large in proportion 
to the scale, which terminates in a sharp prickle pointing 
outwards ; the scale is an inch long. 
The trees I observed in California, growing in a poor 
soil, were not more than 12 to 20 feet high. 
