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AMERICAN CEMBRA PINE. 
PINUS flexxlis, foliis quinis levibus , vagina abbreviata , conis ovatis , 
squamis crassis umbilicatis subcarinatis inermis elongatis gibbosis , 
nucibus duris , seminum alis obliterates, antherarum crista lacera 
acuminata parvula . 
Pinus flexilis. Torrey and James, in Long’s Expedition Annal. Lyceum, 
N. York, vol. 2, p. 249. 
Pinus Lambertiana , /3. Hook. Flor. Bor. Amer. vol. 2, p. 162. 
This species of Pine was discovered by Dr. Edwin James 
in Long’s Expedition, chiefly in subalpine tracts, and ex- 
tending from the lowest range of mountains to the region 
of perpetual frost. In my western tour, I met with it 
also in the first range of the Rocky Mountains called the 
“ Black Hills j” a high broken country, commencing about 
35 or 40 miles from the usual ford of Laremie’s fork of 
the river Platte. Scattering trees of this Pine, mixed with 
clumps of Red Cedars ( Juniperus virginiana ), communicate 
a sombre aspect to these high hills so much in contrast with 
the grassy plains around them, and hence the above appel- 
lation by which they are generally known. We met with 
it afterwards on the granitic hills of the Sweet- Water, 
another northern branch of the Platte, from whence it con- 
tinued to the lofty hills of Bear River, which empties into 
the Lake Timpanagos. 
The American Cembra forms a tree of moderate size, 
40 to 50 feet high, with a large dense summit, and having 
a smooth bark like that of the White Pine. It is remark- 
able for the flexibility of its branches which are leafy at 
their extremities. The leaves grow by fives in the same 
