. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean . - 2243, Jigs. 2133 and 2134. P. brachyptera, Eagel. Bot. Wish. Exp., p. 5. P. Engelmanni Torrey. Bot. Whipples Pep., p. 141. P. Bearpsleyi, Murray. Edenb. Neio Philos. Jour., 1855, p. 286. P. Benthamiana, Hartweg. Jour. Hort. Soc. Lond., 4, Jig. Fig. 12. Cone, scales and leaves of P. Ponderosa, natural size. U3f k B h:ai a. 3URVKY8 OAL,

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