An ecologically annotated checklist of the vascular flora at the Chesapeake Bay Center for Field Biology, with keys - Smithsonian Institution. Office of Ecology (Smithsonian Institution, 1968)

Ecology of Buzzards Bay : an estuarine profile - United States. National Biological Service. (U.S. Dept. of the Interior, National Biological Service, 1996)

An ecology of the Bahamian hutia : Geocapromys ingrahami - Jordan, Kevin Clark. (1989)

Economic plants of Porto Rico - Cook, O. F. (Orator Fuller), 1867 -1949 (Govt. Print Off, 1903)

Ecosystem management : rare species and significant habitats : proceedings of the 15th Annual Natural Areas Conference - Mitchell, Richard S., 1938 - (New York State Museum, University of the State of New York, State Education Dept, 1990)

Edible leaves of the tropics - Martin, Franklin W. (U.S. Science and Education Administration, Agricultural Research, Southern Region, 1979)

Edible wild plants : wild foods from dirt to plate - Kallas, John, 1952 - (Gibbs Smith, 2010)

Edwards's botanical register - Lindley, John, 1799 -1865 (James Ridgway, 1843)

Elementary botany - Atkinson, George Francis, 1854 -1918 (Holt, 1908)

Elementary botany - Atkinson, George Francis, 1854 -1918 (Holt, 1898)

Elementary botany for beginners with special reference to the study of Prairie province plants - Spotton, H. B. (Henry Byron), 1844 -1933 (W.J. Gage, 1914)

An elementary course of botany : structural, physiological, and systematic - Henfrey, Arthur, 1819 -1859 (John Van Voorst, 1878)

Elementary flora of the Northwest - Rigg, George B. (George Burton) (American Book Company, 1914)

Elementary flora of the Northwest - Rigg, George B. (George Burton) (American book company, 1914)

An elementary text-book of botany - Vines, Sydney Howard, 1849 -1934 (W.S. Sonnenschein & Allen, 1880)

Elemente der paläontologie bearbeitet - Döderlein, Ludwig, 1855 -1936 (Engelmann, 1890)

The elements of botany for beginners and for schools - Gray, Asa, 1810 -1888 (American book company, 1901)

Elements of botany : structural, physiological, systematical, and medical - Lindley, John, 1799 -1865 (Printed for Taylor and Walton, 1841)

Encyclopædie der Naturwissenschaften. Abt. 2, T. 2, Handwörterbuch der Pharmakognosie des Pflanzenreichs - Wittstein, Georg Christian, 1810 -1887 (Eduard Trewendt, 1882)

Endangered and threatened species of the Southeastern United States including Puerto Rico and the Virgin Islands - United States. Forest Service. (U.S. Forest Service], 1982)

English botany, or, Coloured figures of British plants - Sowerby, James de Carle, 1787 -1871 (Hardwicke, 1863)

Enhancement restoration and creation of vernal pools at Del Sol Open Space and Vernal Pool Reserve, Santa Barbara County, California - Ferren, Wayne R. (University of California, Santa Barbara, 1988)

Ensayo sobre las plantas usuales de Costa Rica - Pittier, Henri, 1857 -1950 (H.L. & J.B. McQueen, 1908)

... Ensayo sobre las plantas usuales de Costa Rica - Pittier, Henri, 1857 -1950 (H.L. & J.B. McQueen, inc, 1908)

Entomological news - American Entomological Society. (American Entomological Society, 1988)

Entomological news - American Entomological Society. (American Entomological Society, 2008)

The entomologist's record and journal of variation - Tutt, James William, 1858 -1911 (s.n, 1974)

Enumeratio plantarum hucusque in Mongolia nec non adjacente parte Turkestaniae sinensis lectarum. Fasc. 1, Thalamiflorae et disciflorae - Maximowicz, C. J., 1827 -1891 (Typis Academiae Imperialis Scientiarum Petropolitanae, 1889)

Enumeratio seminum R. Horto Botanico Pisano ... - Orto botanico di Pisa. (Orto botanico di Pisa, 1916)

Enumeratio systematica fungorum in omnium herbarum europaearum organis diversis hucusque observatorum mentione facta fontium litterariorum diagnoses eorum figurasque proferentium nec non praecipuorum eorum synonymorum numerorumque collectionum plurium venalium species enumeratas - Oudemans, C. A. J. A. (Cornelis Antoon Jan Abraham), 1825 -1906 (apud M. Nijhoff, 1919)

An enumeration of Philippine flowering plants - Merrill, Elmer D. (Elmer Drew), 1876 -1956 (Bureau of Printing, 1922)

An enumeration of the vascular plants known from Surinam, together with their distribution and synonymy - Pulle, A. A. (August Adriaan), 1878 -1955 (E. J. Brill, 1906)

An enumeration of the vascular plants known from Surinam : together with their distribution and synonymy - Pulle, A. A. (August Adriaan), 1878 -1955 (E. J. Brill, 1906)

Erigenia : journal of the Illinois Native Plant Society - Illinois Native Plant Society. (The Society, 1985)

Erigenia : journal of the Illinois Native Plant Society - Illinois Native Plant Society. (The Society, 1991)

Erigenia : journal of the Illinois Native Plant Society - Illinois Native Plant Society. (The Society, 2003)

Ernesti Meyer de plantis labradoricis libri tres - Meyer, Ernst H. F. (Ernst Heinrich Friedrich), 1791 -1858 (Sumtibus Leopoldi Vossii, 1830)

Esercitazioni Accademiche degli Aspiranti Naturalisti - Costa, Oronzio Gabriele, 1789 -1867 (1839)

The Eskimo tribes; their distribution and characteristics, especially as regards language, with a comparative vocabulary and sketch-map - Rink, H. (Hinrich), 1819 -1893 (1887)

The essentials of botany - Bessey, Ernst Athearn, 1877 -1957 (H. Holt and company, 1914)

Essentials of college botany - Bessey, Ernst Athearn, 1877 -1957 (H. Holt, 1914)

The ethnobotany of the Kwanyama Ovambos - Rodin, Robert J. (Missouri Botanical Garden], 1985)

The ethology and systematic relationships of fideliine bees, including a description of the mature larva of Parafidelia (Hymenoptera, Apoidea) - Rozen, Jerome G. Jr. (Jerome George), 1928 - (American Museum of Natural History, 1977)

Études sur la flore des districts des Bangala et de l'Ubangi (Congo Belge) ; Plantae Thonnerianae Congolenses. Série II - De Wildeman, Emile 1866 -1947 (Misch & Thron, 1911)

Evansia - New York Botanical Garden (American Bryological and Lichenological Society, 1994)

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)

Exkursionsflora von Europa : Anleitung zum Bestimmen der Gattungen der europäischen Blütenpflanzen - Thonner, Franz, 1863 - (R. Friedländer, 1901)

Expedição scientifica à Serra da Estrella em 1881 - Sociedade de Geografia de Lisboa. (Imprensa Nacional, 1883)

The families of flowering plants - Pollard, Charles Louis, 1872 -1945 (The Plant World Co, 1900)

Farlowia :a journal of cryptogamic botany (Farlow Library and Herbarium of Harvard University, 1944)

Farm weeds of Canada - Fletcher, James 1852 -1908 (Dept. of Agriculture, 1923)

Farm weeds of Canada - Fletcher, James 1852 -1908 (Govt. Print. Bureau, 1909)

The Fern bulletin - Clute, Willard Nelson, 1869 -1950 (W. N. Clute & Co, 1897)

The ferns, fern allies and flowering plants of Rhode Island - Providence Franklin Society. (Providence Franklin Society, 1920)

A Festschrift for William G. D'arcy : the legacy of a taxonomist - Keating, Richard C (Missouri Botanical Garden Press, 2005)

Field book of American wild flowers; being a short description of their character and habits, a concise definition of their colors, and incidental references to the insects which assist in their fertilization - Mathews, F. Schuyler (Ferdinand Schuyler), 1854 -1938 (Putnam, 1912)

Field book of western wild flowers - Armstrong, Margaret, 1867 -1944 (Putnam, 1915)

Field book of western wild flowers - Armstrong, Margaret, 1867 -1944 (C.[!] P. Putnam;s sons, 1915)

Field book of western wild flowers - Armstrong, Margaret, 1867 -1944 (C. [sic] P. Putnam's Sons, 1915)

Field, forest, and garden botany; a simple introduction to the common plants of the United States east of the 100th meridian, both wild and cultivated - Gray, Asa, 1810 -1888 (American Book Company, 1895)

Field guide to noxious and invasive weeds : known to occur or are potentially occurring on the Apache-Sitgreaves National Forests - United States. Forest Service. Southwestern Region. (United States Dept. of Agriculture, Forest Service, Southwestern Region], 2008)

Field key to the flora of Yellowstone National Park - United States. National Park Service. (Yellowstone Library and Museum Association in cooperation with National Park Service, U.S. Dept. of the Interior, 1975)

Field Museum of Natural History bulletin - Field Museum of Natural History. (The Museum, 1985)

Field Museum of Natural History bulletin - Field Museum of Natural History. (The Museum, 1986)

Field notes of Charles Wright for 1849 and 1851-52, relating to collections from Texas, New Mexico, Arizona and adjacent Sonora and Chihuahua - Wright, Charles, 1811 -1885 (1847)

Fieldbook of Illinois wild flowers; six hundred fifty of the more common flowering plants in the state - Illinois. Natural History Survey Division (Illinois. Natural History Survey Division, 1936)

Fieldiana. Anthropology - Field Museum of Natural History. (Chicago Natural History Museum, 1972)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1946)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1977)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1971)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1980)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1983)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1984)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1986)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 1990)

Fieldiana. Botany - Field Museum of Natural History. (Chicago Natural History Museum, 2005)

Final environmental impact statement : proposed estuarine sanctuary grant award to the state of New York for a Hudson River estuarine sanctuary - National Ocean Survey. Office of Coastal Zone Management. (The Office, 1982)

Finlands kärlvexter, ordnade i et naturligt system - Alcenius, Otto, 1838 -1913 (J. Simelii tryck, 1863)

Flórula de las reservas biológicas de Iquitos, Perú : Allpahuayo-Mishana, Explornapo Camp, Explorama Lodge - Missouri Botanical Garden. (Missouri Botanical Garden, 1997)

Flora and fauna of Bucks County - Moyer, I. S. (Lewis, 1905)

Flora and vegetation of the Sierra Ancha Experimental Forest, Arizona - Pase, C. P., 1926 - (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1968)

Flora balearica, étude phytogéographique sur les íles Baléares - Knoche, Herman, 1870 -1945 (Imp. Roumégous et Déhan], 1921)

Flora balearica, étude phytogéographique sur les íles Baléares - Knoche, Herman, 1870 -1945 (Imp. Roumégous et Déhan], 1821)

Flora Brasiliensis, enumeratio plantarum in Brasilia hactenus detectarum :quas suis aliorumque botanicorum studiis descriptas et methodo naturali digestas partim icone illustratas - Martius, Karl Friedrich Philipp von, 1794 -1868 (R. Oldenbourg, 1927)

Flora Brasiliensis, enumeratio plantarum in Brasilia hactenus detectarum :quas suis aliorumque botanicorum studiis descriptas et methodo naturali digestas partim icone illustratas - Martius, Karl Friedrich Philipp von, 1794 -1868 (R. Oldenbourg, 1840)

Flora Brasiliensis, enumeratio plantarum in Brasilia hactenus detectarum :quas suis aliorumque botanicorum studiis descriptas et methodo naturali digestas partim icone illustratas - Martius, Karl Friedrich Philipp von, 1794 -1868 (R. Oldenbourg, 1867)