The evolution of plants - Scott, Dukinfield Henry, 1854 -1934 (Williams and Norgate, 1911)

Excursionsflora für die Schweiz : Nach der analytischen Methode - Gremli, A. (August), 1833 -1899 (Durck und Verlag von E. Wirz worm. J.J. Christen, 1896)

Excursionsflora für das Grossherzogthum Baden - Seubert, Moritz, 1818 -1878 (J. Engelhorn, 1863)

Excursionsflora für Oesterreich, mit Ausschluss von Galizien, Bukowina und Dalmatien. Mit theilseiser Benützung des "Botanischen Excursionsbuches" von G. Lorinser - Fritsch, Karl, 1864 -1934 (C. Gerold's Sohn, 1897)

Exkursionsflora für Österreich, mit Ausschlus von Galizien, Bukowina und Dalmatien - Fritsch, Karl, 1864 -1934 (Karl Gerolds Sohn, 1909)

Exotic house plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1958)

Exotic house plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1956)

Exotic plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1950)

Exotic plants illustrated : their requirements and background - Graf, Alfred Byrd. (J. Roehrs Co, 1954)

Exotic plants illustrated : their requirements and background - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1953)

Exotics - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Roehrs, 1947)

Experimental and molecular approaches to plant biosystematics - Hoch, Peter C (Missouri Botanical Garden, 1995)

The fairy-land of science - Buckley, Arabella B. (Arabella Burton), 1840 -1929 (E. Stanford, 1892)

The fairy-land of science - Buckley, Arabella B. (Arabella Burton), 1840 -1929 (William Briggs, 1898)

The fairy-land of science - Buckley, Arabella B. (Arabella Burton), 1840 -1929 (D. Appleton, 1893)

The fairy-land of science - Buckley, Arabella B. (Arabella Burton), 1840 -1929 (D. Appleton and company, 1899)

Fall 1932 trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Good & Reese Co, 1932)

Fall 1933, spring 1934 trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Good & Reese Co, 1933)

Fall wholesale list, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Storrs and Harrison Co, 1941)

Favourite flowers of garden and greenhouse - Step, Edward, 1855 -1931 (Frederick Warne & co, 1897)

The fern allies of North America north of Mexico - Clute, Willard Nelson, 1869 -1950 (F. A. Stokes company, 1905)

The fern allies of North America north of Mexico - Clute, Willard Nelson, 1869 -1950 (F. A. Stokes, 1905)

The fern allies of North America north of Mexico - Clute, Willard Nelson, 1869 -1950 (Stokes, 1905)