Nature's garden : an aid to knowledge of our wild flowers and their insect visitors - Doubleday, Nellie Blanchan DeGraff, 1865 -1918 (Doubleday, Page, 1901)

Nature's garden; an aid to knowledge of our wild flowers and their insect visitors - Doubleday, Nellie Blanchan DeGraff, 1865 -1918 (Doubleday, Page & Co, 1922)

Nature's garden; an aid to knowledge of our wild flowers and their insect visitors - Doubleday, Nellie Blanchan DeGraff, 1865 -1918 (Doubleday, Page & Company, 1905)

Nature's garden; an aid to knowledge of our wild flowers and their insect visitors - Doubleday, Nellie Blanchan DeGraff, 1865 -1918 (Doubleday, 1920)

Nature's garden : With many color illustrations - Doubleday, Nellie Blanchan DeGraff, 1865 -1918 (Garden City Pub. Co, 1900)

Naturwissenschaftliche Wochenschrift - Deutsche Gesellschaft für Volkstümliche Naturkunde in Berlin. (G. Fischer [etc.], 1918)

Naturwissenschaftliche Wochenschrift - Deutsche Gesellschaft für Volkstümliche Naturkunde in Berlin. (G. Fischer [etc.], 1922)

Nederlandsch kruidkundig archief - Koninklijke Nederlandse Botanische Vereniging. (S. en J. Luchtmans, 1903)

Neues allgemeines Garten-Magazin - Bernhardi, Johann Jacob, 1774 -1850 (Im Verlage der Grossherzogl. Sachs. priv. Landes-Industrie-Comptoirs, 1828)

Neues Journal für die Botanik - Schrader, H. A. (Heinrich Adolph),‏ 1767 -1836 (Friedrich August Knick, 1807)

The new botanic garden : illustrated with one hundred and thirty-three plants - Dickson, R. W. (Printed for John Stockdale, Piccadilly, by T. Bensley, Bolt-Court, Fleet-Street.,c, 1812)

New England wild flowers and their seasons - Bailey, William Whitman, 1843 -1914 (Preston and Rounds, 1897)

New Jersey insects - Smith, John Bernhard, 1858 -1912 (s.n, 1909)

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 Co, 1909)

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

The New phytologist - Tansley, A. G., Sir, (Arthur George), 1871 -1955 (Academic Press, 1913)

The New phytologist - Tansley, A. G., Sir, (Arthur George), 1871 -1955 (Academic Press, 1918)

New York State Museum bulletin - New York State Museum. (University of the State of New York, 1917)

New York State Museum bulletin - New York State Museum. (University of the State of New York, 1924)

New York State Museum bulletin - New York State Museum. (University of the State of New York, 1942)

New York State : state floras - Gray, Asa, 1810 -1888 (various publishers, 1814)

News - Indiana Native Plant; Wildflower Society. (Indiana Native Plant and Wildflower Society, 2000)

Newsletter - Colorado Native Plant Society. (The Society, 1983)

Nomenclator botanicus, seu, Synonymia plantarum universalis :enumerans ordine alphabetico nomina atque synonyma, tum generica tum specifica, et a Linnaeo et a recentioribus de re botanica scriptoribus plantis phanerogamis imposita - Steudel, Ernst Gottlieb, 1783 -1856 (typis et sumptibus J.G. Cottae, 1840)

North American fauna - U.S. Fish; Wildlife Service (Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off, 1926)

North American ferns and wild flowers for fall 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Aiken Nurseries, 1933)

North American flora - New York Botanical Garden (New York Botanical Garden, 1924)

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

North American flora - New York Botanical Garden (New York Botanical Garden, 1939)

North American wildflowers and ferns : fall 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (George D. Aiken, 1934)

North American wildflowers and ferns for fall 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Aiken Nurseries, 1933)

North Wisconsin native plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. G. Knowlton, 1929)

North Wisconsin wildings from the Green Grassy Hollow - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. G. Knowlton, 1932)

North Wisconsin wildlings from the Green Grassy Hollow ; F. G. Knowlton - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Green Grassy Hollow, 1930)

Notes on the distribution and bibliography of North American bees of the families, Apidae, Meliponidae, Bombidae, Euglossidae, and Anthophoridae - Cockerell, Theodore D. A. (Theodore Dru Alison), 1866 -1948 (1920)

Notes on the flora of Nova Scotia - Fernald, Merritt Lyndon, 1873 -1950 (1920)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1902)

Le nouveau jardin - Vera, André (Émile-Paul Éditeur, 1912)

Nouveaux mémoires de l'Académie royale des sciences et belles-lettres de Bruxelles - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (1841)

Nouveaux mémoires de l'Académie royale des sciences et belles-lettres de Bruxelles - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (1842)

Nouveaux mémoires de l'Académie royale des sciences et belles-lettres de Bruxelles - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (1843)

Nova acta physico-medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (1831)

Novus conspectus florae Europae; sive, Enumeratio systematica plantarum omnium in Europa hucusque sponte cognitarum - Gandoger, Michel, 1850 -1926 (A. Hermann, 1910)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1900)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1911)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1921)

Observations on the flowering plants, ferns and fern allies growing wild in Marquette County, Michigan, in 1916 and 1917, especially in the vicinity of the Huron Mountain Club - University of Michigan. Museum of Zoology. (Published by the University, 1918)

Occasional papers of the Museum of Zoology, University of Michigan - University of Michigan. Museum of Zoology. (University of Michigan, 1922)

Oesterreichische botanische Zeitschrift (A. Skofitz)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1888)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1892)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1911)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 1998)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2016)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1900)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1904)

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

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1910)

The orchids in the Ottawa District : floristics, phytogeography, population studies and historical review / Joyce M. Reddoch and Allan H. Reddoch - Ottawa Field-Naturalists' Club (The Ottawa Field-Naturalists' Club, 1997)

The Ornithologist and botanist ([J.E. Blain, 1892)

O.S.U. naturalist - Ohio State University. Biological Club. (Biological Club of Ohio State University, 1902)

O.S.U. naturalist - Ohio State University. Biological Club. (Biological Club of Ohio State University, 1903)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1892)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1912)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1913)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1914)

Our garden flowers; a popular study of their native lands, their life histories, and their structural affiliations - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (C. Scribner's Sons, 1910)

Our mountain garden - Thomas, Rose Fay, 1852 -1929 (E.P. Dutton & Co, 1915)

Our mountain garden - Thomas, Rose Fay, 1852 -1929 (E.P. Dutton, 1915)

Our northern autumn, a study of its characteristic flowers, its brilliant foliage and its conspicuous fruits - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (Scribner, 1920)

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 forestry in Pennsylvania (1900)

Pamphlets on silviculture (1899)

Papers on Diptera - Aldrich, John Merton, 1866 -1934 (Smithsonian Institution, 1910)

Papers presented at the Celebration of the Twentieth Anniversary of the New York Botanical Garden, September 6-9, 1915. Published by the aid of the David Lydig Fund, bequethed by Charles P. Daly - New York Botanical Garden (1916)

Park's illustrated flower book of choice dependable seeds : season of 1923 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park, 1923)

Peonies, native wild flowers, rockery plants : autumn supplement to spring of 1928 catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank W. Campbell, 1928)

Perennials in your garden - Canada. Agriculture Canada (Agriculture Canada, 1983)

Petals from Flowerland : 1932 a new year, Olympiad a new rose - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paul J. Howard's Horticultural Establishment, 1932)

Pflanzen-teratologie systematisch geordnet - Penzig, O. (Ottone), 1856 -1929 (A. Ciminago, 1894)

Die Pflanzenwelt Deutschlands; Lehrbuch der Formations- biologie. Eine Darstellung der Lebensgeschichte der wildwachsenden Pflanzenvereine und der Kulturflächen - Graebner, Paul, 1871 -1933 (Quelle & Meyer, 1909)

Photographing flowers and trees, and The use of natural forms in decorative photography - McFarland, J. Horace (John Horace), 1859 -1948 (Tennant and Ward, 1911)

Photoperiodism and related phenomena in plants and animals; proceedings - Withrow, Robert B. 1904 -1958 (1959)

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)

Phytogeography of Nebraska. 1. General survey by Roscoe Pound and Frederic E. Clements - Clements, Frederic E. (Frederic Edward), 1874 -1945 (Published by the Seminar, 1900)

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

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1975)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1982)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1983)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1986)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1990)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1995)

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

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1997)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1998)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2004)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2007)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2009)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2010)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1841)

Phytoneuron (Guy L. Nesom, 2011)

Phytoneuron (Guy L. Nesom, 2012)

Phytoneuron (Guy L. Nesom, 2013)

Phytoneuron (Guy L. Nesom, 2014)

Phytoneuron (Guy L. Nesom, 2015)

Phytoneuron (Guy L. Nesom, 2016)

Phytoneuron (Guy L. Nesom, 2017)

Pittonia :a series of papers relating to botany and botanists - Greene, Edward Lee, 1843 -1915 (Doxey & Co. [etc.], 1899)