Allgemeine botanische Zeitschrift für Systematik, Floristik, Pflanzengeographie etc - Kneucker, Johann Andreas, 1862 -1946 (J.J. Reiff, 1902)

Allgemeine botanische Zeitschrift für Systematik, Floristik, Pflanzengeographie etc - Kneucker, Johann Andreas, 1862 -1946 (J.J. Reiff, 1904)

Bemerkungen zu den "Gramineae exsiccatae" - Kneucker, Johann Andreas, 1862 -1946 (A. Kneucker], 1900)

Botany - Gray, Asa, 1810 -1888 (John Wilson and Son, 1880)

Botany - Gray, Asa, 1810 -1888 (Welch, Bigelow, University Press, 1876)

Botany - Gray, Asa, 1810 -1888 (John Wilson and Son, 1880)

Bulletin of the Biological Society of Washington - Biological Society of Washington (The Society, 1918)

Bulletin of the Torrey Botanical Club - Torrey Botanical Club. (Torrey Botanical Club, 1875)

Bulletin - Smithsonian Institution. (G.P.O, 1931)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1923)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1923)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1923)

John Carey and John Torrey correspondence, 1835-1854 - Carey, John, 1797 -1880 (1835)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1937)

The native flora of the vicinity of Cold Spring Harbor, L.I., New York - Grier, Norman McDowell 1890 -1951 (1925)

The native flora of the vicinity of Cold Spring Harbor, L.I., New York - Grier, Norman McDowell 1890 -1951 (1925)

Neue Entdeckungen im ganzen Umfang der Pflanzenkunde - Sprengel, Kurt Polycarp Joachim, 1766 -1833 (F. Fleischer, 1821)

Research methods in ecology - Clements, Frederic E. (Frederic Edward), 1874 -1945 (University Pub. Co, 1905)

Research methods in ecology - Clements, Frederic E. (Frederic Edward), 1874 -1945 (University Pub. Co, 1905)

A sketch of the natural history of the District of Columbia together with an indexed ed. of the U. S. Geological survey's 1917 map of Washington and vicinity - McAtee, W. L. (Waldo Lee) 1883 -1962 ([Press of H. L. & J. B. McQueen, inc.], 1918)

A sketch of the natural history of the District of Columbia together with an indexed edition of the U.S. Geological survey's 1917 map of Washington and vicinity - McAtee, W. L. (Waldo Lee) 1883 -1962 (H.L. & J.B. McQueen, Inc, 1918)

A sketch of the natural history of the District of Columbia together with an indexed edition of the U.S. Geological survey's 1917 map of Washington and vicinity - McAtee, W. L. (Waldo Lee) 1883 -1962 (H.L. & J.B. McQueen, Inc, 1918)

Symbolae Antillanae,seu, Fundamenta florae Indiae Occidentalis - Urban, Ignaz, 1848 -1931 (Fratres Borntraeger ;Paul Klincksieck, 1900)