Philadelphia: Robert P. Smith, 1852. Small quarto, six volumes. Contemporary green morocco, elaborate gilt tooling to spines and boards: borders of interwoven fillets, arabesques, and central illustration of a Jalap bindweed, six spine compartments, yellow endpapers, all page edges gilt. Near Fine. Spines slightly darkened, moderate foxing throughout (prominent at the plates), a few faint bruises at the front endpapers of a few volumes, and scattered discoloration of the page edge gilt. The first three volumes are authored by Michaux, with the full title, "The North American Sylva; or A Description of the Forest Trees of the United States, Canada, and Nova Scotia, Considered Particularly with Respect to Their Use in the Arts, and Their Introduction into Commerce, to Which is Added, a Description of the Most Useful of the European Forest Trees." The last three volumes were authored by Nuttall, as "The North American Sylva; or A Description of the Forest Trees of the United States, Canada and Nova Scotia, Not Described in the Work of F. Andrew Michaux, and Containing All the Forest Trees Discovered in the Rocky Mountains, the Territory of Oregon, Down to the Shores of the Pacific, and into the Confines of California, as Wells as in Various Parts of the United States." Michaux's original three volumes were a result of ten years of research, illustrated with 156 colored copperplate engravings by the Route brothers, Pierre Joseph and Henri Joseph, and Pancrace Bessa, and were generally considered the authoritative text in the field upon its publication. Nuttall added 127 plates for his three volumes, making the two works united one of the most complete works on the subject, unparalleled in its production, descriptions, and illustrations. Sabin 48695. Nissen 1361.