Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 6, Pt. 3

BOTANY.
as having "pendulous, squarrose, cylindrical cones," which, with its quinate leaves, "assimilate it to P. strobus; " but "the seed, large and eatable, leaves not serrulate and stouter.
Dr. James, on the contrary, says his P. flexili8 has, like P. 81robU8, leaves, 5 in a fascicle, but
beyond that there is little resemblance. " The leaves are short and rigid, the sheaths short
and lacerated, the strobile.3 erect) composed of large unarmed scales, being somewhat smaller
than those of P. rigida, but similar in shape, and exuding a great quantity of resin," &c.
His description of the tree agrees well with that of the species under consideration, except that
he does not mention the white bark. The flexible branches and short leaves confined to the
extremities of the branches of P.flexiig are characters shared by most of the five-leaved pines,
which form a group by themselves, and should perhaps constitute a sub-genus. The red,
oblique-based resinless cones of our trees seem clearly to distinguish it.
The wood of P. exils is white and soft and not highly charged with resin, resembling that
of P. strobus and P. Lambert1iana.
PICEA GRANDIS, Dougl. (Plate VI.) The
P. GRANDIS, Loudon, Arboret, p. 2341,g,
PINUS GRANDIS, Dougl. ms.
ABIES GRANDIS, Lindl. Penny Cyclop. No.3
A. GRANDIS, Hook. Flor., Bor. A4mer. 2, 1
A. GRANDIS, Nutt. Sylva. 3.
Fig. 16.
Fig. 16. Cone, leaves, scales, and seed of P. grandis, natural size.
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