Native woody plants of the United States, their erosion-control and wildlife values - United States. (U. S. Govt. print. off, 1938)

Naturae novitates : Bibliographie neuer Erscheinungen aller Länder auf dem Gebiete der Naturgeschichte und der exacten Wissenschaften (R. Friedländer & Sohn, 1916)

Natural history manual of the T. C. U. vicinity / prepared by Hortense Winton, W. M. Winton and Gayle Scott - Winton, W. M. (Texas Christian University, 1924)

La naturaleza; periódico científico del Museo Nacional de Historia Natural y de la Sociedad Mexicana de Historia Natural - Sociedad Mexicana de Historia Natural. (Impr. de I. Escalante, 1887)

La naturaleza; periódico científico del Museo Nacional de Historia Natural y de la Sociedad Mexicana de Historia Natural - Sociedad Mexicana de Historia Natural. (Impr. de I. Escalante, 1891)

A naturalist in the Bahamas - Osborn, Henry Fairfield, 1857 -1935 (Columbia University Press, 1910)

A naturalist in the Bahamas: John I. Northrop, October 12 1861 - June 25, 1891: a memorial volume - Osborn, Henry Fairfield, 1857 -1935 (Columbia University Press, 1910)

A naturalist in the Bahamas, John I. Northrop, October 12, 1861-June 25, 1891; a memorial volume - Osborn, Henry Fairfield, 1857 -1935 (Columbia University Press, 1910)

Nature - Lockyer, Norman, Sir, 1836 -1920 (Macmillan Journals Ltd., etc, 1909)

Nature - Lockyer, Norman, Sir, 1836 -1920 (Macmillan Journals Ltd., etc, 1916)

Nature - Lockyer, Norman, Sir, 1836 -1920 (Macmillan Journals Ltd., etc, 1921)

La nature tropicale - Costantin, J. (Julien), 1857 -1936 (F. Alcan, 1899)

Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet - Engler, Adolf, 1844 -1930 (W. Engelmann, 1900)

Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet - Engler, Adolf, 1844 -1930 (W. Engelmann, 1887)

Naturwissenschaftliche Wochenschrift - Deutsche Gesellschaft für Volkstümliche Naturkunde in Berlin. (G. Fischer [etc.], 1893)

Naturwissenschaftliche Wochenschrift - Deutsche Gesellschaft für Volkstümliche Naturkunde in Berlin. (G. Fischer [etc.], 1902)

Naturwissenschaftliche Wochenschrift - Deutsche Gesellschaft für Volkstümliche Naturkunde in Berlin. (G. Fischer [etc.], 1908)

The navel orange of Bahia : with notes on some little-known Brazilian fruits - Popenoe, Wilson, 1892 -1975 (U.S. Dept. of Agriculture, 1917)

New manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada, rearr. and extensively rev. by Benjamin Lincoln Robinson and Merritt Lyndon Fernald - Robinson, Benjamin Lincoln, 1864 -1935 (American Book Co, 1908)

New manual of botany of the central Rocky mountains (vascular plants) - Coulter, John Merle, 1851 -1928 (American Book Company, 1909)

New manual of botany of the central Rocky mountains (vascular plants) - Coulter, John Merle, 1851 -1928 (American book company, 1909)

New manual of botany of the central Rocky Mountains, vascular plants - Coulter, John Merle, 1851 -1928 (American Book Co, 1909)

The New Mexico botanist - New Mexico State University. Cooperative Extension Service. (Range Science Herbarium and Cooperative Extension Service, 1998)

The New Mexico botanist - New Mexico State University. Cooperative Extension Service. (Range Science Herbarium and Cooperative Extension Service, 2004)

The New Mexico botanist - New Mexico State University. Cooperative Extension Service. (Range Science Herbarium and Cooperative Extension Service, 2018)

The New phytologist - Tansley, A. G., Sir, (Arthur George), 1871 -1955 (Academic Press, 1903)

Nomenclator botanicus. Nominum ad finem anni 1858 publici juris factorum, classes, ordines, tribus, familias, divisiones, genera, subgenera vel sectiones designatium enumeratio alphabetica. Adjectis auctoribus, temporibus, locis systematicis, apud varios, notis literariis atque etymologicis et synonymis - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Sumptibus T. Fischeri, 1873)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1910)

North American flora - New York Botanical Garden (New York Botanical Garden, 1926)

North American flora - New York Botanical Garden (New York Botanical Garden, 1931)

The North American Pyrenomycetes. A contribution to mycologic botany - Everhart, B. M. (Benjamin Matlack), 1818 -1904 (Ellis & Everhart, 1892)

North American wild flowers - Walcott, Mary Vaux, 1860 -1940 (Smithsonian Institution, 1925)

Northwest flora - Rigg, George B. (George Burton) (University bookstore, 1912)

Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem - Botanischer Garten und Museum (Berlin, Germany) (Botanisches Museum, 1921)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1911)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1912)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1913)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1915)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 1994)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 1996)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2000)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2003)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2011)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1949)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1993)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1904)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1905)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1903)

Om vegetationen paa de Dansk-Vestindiske er - Børgesen, Frederik, 1866 -1956 (E. Bojesen, 1898)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1909)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1954)

Oréades - Instituto de Ciências Biológicas da UFMG. Departamento de Botânica. (Departamento de Botânica, U.F.M.G, 1981)

Oregon wild flowers, rock plants and seeds, lilies, trees and shrubs, ferns, perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mrs. Clarice Nye, 1944)

Ornamental shrubs of the United States, hardy, cultivated - Apgar, A. C. (Austin Craig), 1838 -1908 (American Book Co, 1910)

Ornamental shrubs of the United States (hardy, cultivated) - Apgar, A. C. (Austin Craig), 1838 -1908 (American Book Company, 1910)

Our Araby: Palm Springs and the Garden of the sun - Chase, J. Smeaton (Joseph Smeaton), 1864 -1923 (Printed for J. S. Chase by Star-news publishing company, 1920)

Our northern shrubs and how to identify them : a handbook for the nature-lover - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (Charles Scribner's Sons, 1922)

Our northern shrubs and how to identify them; a handbook for the nature-lover - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (C. Scribner, 1903)

Our northern shrubs and how to identify them; a handbook for the nature-lover - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (Scribner, 1903)

Our northern shrubs and how to identify them; a handbook for the nature-lover - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (C. Scribner, 1912)

An outline of plant geography (The Macmillan company, 1926)

Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) - Leavitt, Robert Greenleaf, 1865 - (American Book Co, 1901)

Pamphlets on forest protection (1900)

Pamphlets on forestry. History (1900)

Pamphlets on forestry in California (1900)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1985)

Parasitism of Comandra umbellata - Hedgcock, George G. (George Grant), 1863 -1946 (Dept. of Agriculture, 1915)

Park and cemetery and landscape gardening - Haight, R. J. (Rufus J.) (R.J. Haight, 1901)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

Pathological plant anatomy - Küster, E. (Ernst), 1874 -1953 (1913)

A pathological survey of the Para rubber tree (Hevea brasiliensis) in the Amazon Valley - Weir, James R. (James Robert), 1882 -1943 (U.S. Dept. of Agriculture, 1926)

Pathologische Pflanzenanatomie. In ihren Grundzügen - Küster, E. (Ernst), 1874 -1953 (G. Fischer, 1916)

Patterson's numbered check-list of North American plants north of Mexico - Patterson, Harry N. (Harry Norton), 1853 -1919 (Patterson, 1892)

Perú: Cordillera Escalera-Loreto - Stotz, Douglas F. (Douglas Forrester), 1956 - (The Field Museum, Science and Education, 2014)

Perú : Cerros de Kampankis - Stotz, Douglas F. (Douglas Forrester), 1956 - (The Field Museum, Environment, Culture, and Conservation, 2012)

Perú : Tapiche-Blanco - Field Museum of Natural History. (The Field Museum, 2015)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Die Pflanzenwelt der peruanischen Anden in ihren Grundzügen dargestellt - Weberbauer, A. (August), 1871 -1948 (W. Engelmann, 1911)

Pharmacal plants and their culture - Schneider, Albert, 1863 -1928 (Richardson, Superintendent of State Printing, 1912)

Phoradendron on conifers - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, 1981)

Physiological botany; I. Outlines of the histology of phaenogamous plants; II. Vegetable physiology - Goodale, George L. (George Lincoln), 1839 -1923 (Ivison, Blakeman, Taylor, 1885)

Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology - Goodale, George L. (George Lincoln), 1839 -1923 (American Book Co, 1885)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1921)

Phytogeographic survey of North America. A consideration of the phytogeography of the North American continent, including Mexico, Central America and the West Indies, together with the evolution of North American plant distribution - Harshberger, John W. (John William), 1869 -1929 (W. Engelmann, 1911)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1938)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1933)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1970)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1971)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1972)