Alaska-cedar : a bibliography with abstracts - Harris, A. S. (Pacific Northwest Forest and Range Experiment Station, Institute of Northern Forestry, 1969)

American forest trees, by Henry H. Gibson - Maxwell, Hu, 1860 -1927 (Hardwood record, 1913)

American forest trees, by Henry H. Gibson - Maxwell, Hu, 1860 -1927 (Hardwood record, 1913)

American forest trees, by Henry H. Gibson - Maxwell, Hu, 1860 -1927 (Hardwood record, 1913)

American forest trees - Maxwell, Hu, 1860 -1927 (Hardwood Record, 1913)

American forest trees - Maxwell, Hu, 1860 -1927 (Hardwood Record, 1913)

American journal of botany - Botanical Society of America. (Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1916)

Annotated list of the wild flowers of California - Kennedy, Patrick Beveridge, 1874 -1930 (Levison Print. Co, 1917)

Apple breeding at the University of Illinois - Crandall, Charles S. (Charles Spencer), 1852 -1929 (University of Illinois Agricultural Experiment Station, 1926)

Bibliographical index to North American botany; or, Citations of authorities for all the recorded indigenous and naturalized species of the flora of North America, with a chronological arrangement of the synonymy Part I Polypetalae - Watson, Sereno, 1826 -1892 (Smithsonian Institution, 1878)

Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere - Rehder, Alfred, 1863 -1949 (Arnold Arboretum of Harvard Univ, 1949)

Botanical abstracts - Board of Control of Botanical Abstracts. (Williams & Wilkins Co, 1920)

Botanical abstracts - Board of Control of Botanical Abstracts. (Williams & Wilkins Co, 1920)

Botanical abstracts - Board of Control of Botanical Abstracts. (Williams & Wilkins Co, 1920)

Botanisches Zentralblatt; referierendes Organ für das Gesamtgebiet der Botanik - Association internationale des botanistes. (G. Fischer [etc.], 1915)

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

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

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

Botany : current literature - United States. Bureau of Plant Industry. Library. (1919)

Brooklyn Botanic Garden record - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1918)

Bulletin de la Société linnéenne de Normandie - Société linnéenne de Normandie. (The Society, 1868)

Bulletin de la Société linnéenne de Normandie - Société linnéenne de Normandie. (The Society, 1883)

Bulletin of miscellaneous information - Royal Botanic Gardens, Kew. (H.M. Stationery Office, 1919)

Bulletin of miscellaneous information - Royal Botanic Gardens, Kew. (H.M. Stationery Office, 1919)

Bulletin of the New York Botanical Garden - New York Botanical Garden (Published for the Garden by the New Era Printing Co, 1909)

Bulletin of the Torrey Botanical Club - Torrey Botanical Club. (Torrey Botanical Club, 1919)

The Cascade Range and Ashland forest reserves and adjacent regions - Leiberg, John B., 1853 - (Gov't Print. Off, 1900)

A check list of plant rusts in Canada - Canada. Department of Agriculture. (Canada Dept. of Agriculture, 1956)

A check list of plant rusts in Canada - Canada. Department of Agriculture. (Canada Dept. of Agriculture, 1956)

Check list of the forest trees of the United States, their names and ranges - Sudworth, George B. (George Bishop), 1864 -1927 (U.S. Govt. Print. Off, 1927)

Compendium of plant disease and decay fungi in Canada, 1960-1980 - Ginns, J. H. (James Herbert) (Research Branch, Agriculture Canada, 1986)

The continent we live on - Sanderson, Ivan Terence, 1911 -1973 (Random House, 1961)

Contributions from the herbarium of the Geological Survey of Canada - Geological Survey of Canada (s.n.], 1894)

Curtis's botanical magazine - Hooker, Joseph Dalton, 1817 -1911 (Academic Press [etc.], 1919)

Curtis's botanical magazine - Hooker, Joseph Dalton, 1817 -1911 (Academic Press [etc.], 1919)

The Entomologist's annual (John Van Voorst, 1864)

Experiment station record - United States. Office of Experiment Stations. (G.P.O, 1916)

Familiarum naturalium regni vegetabilis synopses monographicae; seu, Enumeratio omnium plantarum hucusque detectarum secundum ordines naturales, genera et species digestarum, additis diagnosibus, synonymis, novarumque vel minus cognitarum descriptionibus - Roemer, Max J. (Landes-Industrie-Comptoir, 1846)

Flora Franciscana. An attempt to classify and describe the vascular plants of middle California - Greene, Edward Lee, 1843 -1915 (Cubery & Co., Printers, 1891)

A flora of California - Jepson, Willis Linn, 1867 -1946 (Cunningham, Curtis & Welch, 1909)

A flora of northwest America : containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia. Vol. I, Phanerogamae - Howell, Thomas, 1842 -1912 ([s.n.], 1897)

A flora of northwest America : containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia. Vol. I, Phanerogamae - Howell, Thomas, 1842 -1912 ([s.n.], 1897)

A flora of northwest America, containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia - Howell, Thomas, 1842 -1912 (1903)

A flora of northwest America, containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia - Howell, Thomas, 1842 -1912 (1903)

A flora of northwest America : containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia - Howell, Thomas, 1842 -1912 ([s.n.], 1903)

A flora of northwest America : containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia - Howell, Thomas, 1842 -1912 ([s.n.], 1903)

A flora of northwest America : containing brief descriptions of all the known indigenous and naturalized plants growing without cultivation north of California, west of Utah, and south of British Columbia - Howell, Thomas, 1842 -1912 ([s.n.], 1903)

A flora of western middle California - Jepson, Willis Linn, 1867 -1946 (Cunningham, Curtiss and Welch, 1911)

A flora of western middle California - Jepson, Willis Linn, 1867 -1946 (Cunningham, Curtiss and Welch, 1911)

A flora of western middle California - Jepson, Willis Linn, 1867 -1946 (Encina Publishing Company, 1901)

A flora of western middle California - Jepson, Willis Linn, 1867 -1946 (Encina Publishing Company, 1901)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Forest trees of the Pacific slope - Sudworth, George B. (George Bishop), 1864 -1927 (Govt. Print. Off, 1908)

Die Gartenwelt - Hesdörffer, Max, 1863 -1920 (G. Schmidt, 1914)

Genera et species staphylinorum insectorum Coleopterorum familiae - Erichson, W. F. (Wilhelm Ferdinand), 1809 -1848 (F.H. Morin, 1840)

Genera et species staphylinorum insectorum Coleopterorum familiae - Erichson, W. F. (Wilhelm Ferdinand), 1809 -1848 (F.H. Morin, 1840)

Genera et species staphylinorum insectorum Coleopterorum familiae - Erichson, W. F. (Wilhelm Ferdinand), 1809 -1848 (F.H. Morin, 1840)

Genera et species staphylinorum insectorum Coleopterorum familiae - Erichson, W. F. (Wilhelm Ferdinand), 1809 -1848 (F.H. Morin, 1840)

Genera et species staphylinorum insectorum coleopterum familiae - Erichson, W. F. (Wilhelm Ferdinand), 1809 -1848 (F. H. Morin, 1840)

Hand-list of Coniferae : grown in the Royal botanic gardens - Royal Botanic Gardens, Kew. (Printed for H. M. Stationery off. by Darling & son, Ltd, 1903)

A handbook of the trees of California - Eastwood, Alice, 1859 -1953 (California Academy of Sciences, 1905)

A handbook of the trees of California - Eastwood, Alice, 1859 -1953 (California Academy of Sciences, 1905)

Handbuch der Laubholzkunde. Beschreibung der in Deutschland heimischen und im Freien kultivierten Bäume und Sträucher - Dippel, Leopold, 1827 -1914 (P. Parey, 1889)

Handbuch der Laubholzkunde : Beschreibung der in Deutschland heimischen und im Freien kultivierten Bäume und Sträucher. Für Botaniker, Gärtner und Forstleute - Dippel, Leopold, 1827 -1914 (P. Parey, 1889)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1909)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1944)

Illustriertes Handbuch der Laubholzkunde; Charakteristik der in Mitteleuropa heimischen und im Freien angepflanzten angiospermen Gehölz-Arten und Formen mit Ausschluss der Bambuseen und Kakteen. Register - Schneider, Camillo, 1876 -1951 (G. Fischer, 1912)

Insecta svecica descripta a Leonardo Gyllenhal ... Classis I. Coleoptera sive Eleuterata Tomus I - Linné, Carl von, 1707 -1778 (litteris F.J. Leverentz, 1810)

Insecta svecica descripta a Leonardo Gyllenhal ... Classis I. Coleoptera sive Eleuterata Tomus I - Linné, Carl von, 1707 -1778 (litteris F.J. Leverentz, 1810)

Insecta svecica descripta a Leonardo Gyllenhal ... Classis I. Coleoptera sive Eleuterata Tomus I - Linné, Carl von, 1707 -1778 (litteris F.J. Leverentz, 1810)

Insecta svecica descripta a Leonardo Gyllenhal ... Classis I. Coleoptera sive Eleuterata Tomus I - Linné, Carl von, 1707 -1778 (litteris F.J. Leverentz, 1810)

Insecta svecica descripta a Leonardo Gyllenhal ... Classis I. Coleoptera sive Eleuterata Tomus I - Linné, Carl von, 1707 -1778 (litteris F.J. Leverentz, 1810)

Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten - Hamburg (Germany). Oberschulbeh. Sektion f Wissenschaftlichen Anstalten. (Lucas Gr & Sillem, 1905)

Journal of the Elisha Mitchell Scientific Society - Elisha Mitchell Scientific Society (Chapel Hill, N.C.) (Elisha Mitchell Scientific Society [etc.], 1909)

Journal of the Royal Horticultural Society of London - Horticultural Society of London (Printed for the Royal Horticultural Society by Spottiswoode & Co, 1915)

Journal of the Royal Horticultural Society of London - Horticultural Society of London (Printed for the Royal Horticultural Society by Spottiswoode & Co, 1921)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1911)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1911)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1914)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1914)

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1914)

Linnaea : Ein Journal für die Botanik in ihrem ganzen Umfange - Schlechtendal, D. F. L. von (Diedrich Franz Leonhard von), 1794 -1866 (F. Dümmler, 1880)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1923)

Manual of the botany of the region of San Francisco Bay ... - Greene, Edward Lee, 1843 -1915 (Cubery & Company, Printers, 1894)

Manual of the botany of the region of San Francisco Bay - Greene, Edward Lee, 1843 -1915 (Cubery & Company, Printers, 1894)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton Mifflin company, 1922)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton Mifflin company, 1922)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton Mifflin company, 1922)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1905)

Manual of the trees of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1905)

Mitteilungen der Deutschen dendrologischen gesellschaft - Deutsche Dendrologische Gesellschaft. (Thyrow (Kr. Teltow), [etc.], 1904)

Möllers Deutsche Gärtner-Zeitung - Möller, Ludwig. ([Ludwig Möller, 1899)

Mycologisches Centralblatt = Mycological review = Revue mycologique = Revista micologica : Zeitschrift für allgemeine und angewandte Mycologie : Organ für wissenschaftliche Forschung auf den Gebieten der allgemeinen Mycologie, Gärungschemie und technischen Mycologie - Wehmer, C. (Carl), 1858 -1935 (G. Fischer, 1914)

Native woody plants of the United States : their erosion-control and wildlife values - Mulford, Furman Lloyd, 1869 - (U.S. Dept. of Agriculture, 1938)

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

North American flora - New York Botanical Garden (New York Botanical Garden, 1912)

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

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

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

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

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

North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies - Britton, Nathaniel Lord, 1859 -1934 (H. Holt and Co, 1908)

North American trees; being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies; with the assistance of John Adolph Shafer - Britton, Nathaniel Lord, 1859 -1934 (Holt, 1908)

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

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1905)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1903)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1905)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1904)

Pamphlets on forestry. History (1900)

Pamphlets on forestry in California (1900)

Park and cemetery and landscape gardening - Haight, R. J. (Rufus J.) (R.J. Haight, 1905)

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

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)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Practical forestry. A treatise on the propagation, planting, and cultivation, with a description, and the botanical and popular names of all the indigenous trees of the United States - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd company, 1884)

Practical forestry. A treatise on the propagation, planting, and cultivation, with a description, and the botanical and popular names of all the indigenous trees of the United States - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd company, 1884)

Practical forestry. A treatise on the propagation, planting, and cultivation, with a description, and the botanical and popular names of all the indigenous trees of the United States - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd company, 1884)

Practical forestry. A treatise on the propagation, planting and cultivation, with a description, and the botanical and popular names of all the indigenous trees of the United States - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd Co, 1884)

Report on the forests of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (G.P.O, 1884)

Report on the forests of North America, exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Govt. Print. Off, 1884)

Report on the forests of North America (exclusive of Mexico) - Sargent, Charles Sprague, 1841 -1927 (G.P.O, 1884)

Scientific papers of Asa Gray - Gray, Asa, 1810 -1888 (Houghton, 1889)

Seeds and plants imported - United States. Department of Agriculture. (G.P.O, 1907)

The silva of North America :a description of the trees which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin and company, 1892)

The silva of North America :a description of the trees which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin and company, 1892)

The silva of North America :a description of the trees which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin and company, 1902)

Sitzungsberichte Abt. 1 Mineralogie, Krystallographie, Botanik, Physiologie der Pflanzen, Zoologie, Paläontologie, Geologie, physische Geographie und Reisen - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Kommission bei A. Hölder, 1895)

Sitzungsberichte Abt. 1 Mineralogie, Krystallographie, Botanik, Physiologie der Pflanzen, Zoologie, Paläontologie, Geologie, physische Geographie und Reisen - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Kommission bei A. Hölder, 1896)

Sitzungsberichte Abt. 1 Mineralogie, Krystallographie, Botanik, Physiologie der Pflanzen, Zoologie, Paläontologie, Geologie, physische Geographie und Reisen - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Kommission bei A. Hölder, 1896)

Sitzungsberichte Abt. 1 Mineralogie, Krystallographie, Botanik, Physiologie der Pflanzen, Zoologie, Paläontologie, Geologie, physische Geographie und Reisen - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Kommission bei A. Hölder, 1896)

The standard cyclopedia of horticulture; a discussion, for the amateur, and the professional and commercial grower, of the kinds, characteristics and methods of cultivation of the species of plants grown in the regions of the United States and Canada for ornament, for fancy, for fruit and for vegetables; with keys to the natural families and genera, descriptions of the horticultural capabilities of the states and provinces and dependent islands, and sketches of eminent horticulturists - Bailey, L. H. (Liberty Hyde), 1858 -1954 (Macmillan, 1919)

Synopsis der mitteleuropaïschen flora - Graebner, Paul, 1871 -1933 (W. Engelmann, 1896)

Tijdschrift voor entomologie - Nederlandse Entomologische Vereniging (Nederlandse Entomologische Vereniging, 1898)

The tree book : a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Marshall, Nina L. (Doubleday, Page & Co, 1914)

The tree book : a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Dugmore, A. Radclyffe (Arthur Radclyffe), 1870 -1955 (Doubleday, Page & Co, 1907)

The tree book : a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, Page & Company, 1913)

The tree book : a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, Page & Company, 1913)

The tree book : a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, Page & Company, 1913)

The tree book; a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, 1920)

The tree book; a popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, Page & Co, 1905)

The tree book. A popular guide to a knowledge of the trees of North America and to their uses and cultivation - Rogers, Julia Ellen, 1866 -1958 (Doubleday, Page, 1912)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)

Zeitschrift für Pflanzenkrankheiten (E. Ulmer, 1891)