Problems of cytology and evolution in the Pteridophyta - Manton, I. (University Press, 1950)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1892)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1878)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1921)

Proceedings of the annual convention of the society of American Florists - Society of American Florists; Ornamental Horticulturists. (Society of American Florists and Ornamental Horticulturalists, 1885)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1963)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1965)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1967)

Proceedings of the Florida Academy of Sciences - Florida Academy of Sciences. (Rose Printing Co., etc, 1940)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1891)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1895)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1889)

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1859)

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1862)

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1866)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1896)

Proceedings of the Scientific Association of Trinidad - Scientific Association of Trinidad. (1864)

Proceedings of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (South London Entomological and Natural history Society, 1920)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1901)

Proceedings of the Washington Academy of Sciences - Washington Academy of Sciences (Washington, D.C.) (Washington Academy of Sciences, 1906)

Procès-verbaux - Société Linnéenne de Bordeaux. (1947)

Prodrome de la flore corse : comprenant les résultats botaniques de six voyages exécutés en Corse sous les auspices de M. Emile Burnat - Briquet, John, 1870 -1931 (Georg, 1910)

Prodromus florae Nepalensis : sive Enumeratio vegetabilium quae in itinere per Nepaliam proprie dictam et regiones conterminas, ann. 1802-1803. Detexit atque legit d. d. Franciscus Hamilton, (olim Buchanan) Accedunt plantae a. d. Wallich nuperius missae - Don, David, 1799 -1841 (J. Gale, 1825)

Prof. dr. Thom©♭'s Flora von Deutschland, ©sterreich und der Schweiz in wort und bild f©ơr schule und haus - Thomé, Otto W. (Otto Wilhelm), 1840 -1925 (F. E. K©œhler, 1886)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1886)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1907)

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Pteridologia : a publication of the American Fern Society - American Fern Society. (The Society, 1989)

Pteridologist - British Pteridological Society. (The Society, 1985)

Pteridologist - British Pteridological Society. (The Society, 1989)

Pteridologist - British Pteridological Society. (The Society, 1990)

Pteridologist - British Pteridological Society. (The Society, 1996)

Pteridologist - British Pteridological Society. (The Society, 2002)

Pteridologist - British Pteridological Society. (The Society, 2007)

Pteridologist - British Pteridological Society. (The Society, 2008)

Pteridologist - British Pteridological Society. (The Society, 2009)

Pteridologist - British Pteridological Society. (The Society, 2011)

Pteridologist - British Pteridological Society. (The Society, 1984)

Pteridologist - British Pteridological Society. (The Society, 2014)

Pteridologist - British Pteridological Society. (The Society, 2016)

Pteridologist - British Pteridological Society. (The Society, 2017)

Pteridologist - British Pteridological Society. (The Society, 2018)

[Publications] - Bureau of Government Laboratories - Philippines. Bureau of Government Laboratories. (Bureau of Public Printing, 1905)

qing zang zi ran di li zi liao - Xu, Jinzhi 徐近之 (ke xue chu ban she)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1874)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1891)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1853)

Reading Naturalist. Reading - Reading Natural History Society.

A record of plants collected in Southern Rhodesia; arramged on Engler's system - Eyles, Fred (1916)

Records of the Botanical Survey of India - Botanical Survey of India. (Office of Supt. of Govt. Print., India, 1904)

Recueil de l'Institut botanique (Université de Bruxelles) - Institut botanique Léo Errera. (Henri Lamertin, 1902)

Red list of the endemic plants of the Caucasus : Armenia, Azerbaijan, Georgia, Iran, Russia, and Turkey - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2014)

Reisen in Ost Afrika in 1859-61. Band III : Abteilung 3 Botanik - Decken, Karl Klaus von der, freiherr, 1833 -1865 ([s.n.], 1879)

Rendiconto delle adunanze e de' lavori dell'Accademia delle Scienze sezione della Società Reale Borbonica di Napoli - Accademia delle Scienze di Napoli (Società Reale Borbonica, 1843)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1910)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1891)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1903)

Reproduction des cryptogames - Rietsch, Maximilien. (G. Baillière, 1882)

Retail list and wholesale list : shrubs, trees, vines, ferns, 1939-1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1939)

Retail list : shrubs and trees, vines and perennials, 1938-1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1938)

Retail price list, 1937 : shrubs, trees, vines, palms, ferns, bedding plants, flowering plants and garden supplies - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward H. Rust, 1937)

Revised list of Hawaiian Pteridophyta - Christensen, Carl, 1872 -1942 (The Museum, 1925)

Revue bretonne de botanique pure et appliquée - Daniel, Lucien, 1856 -1940 (Guillemin, 1908)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1969)

Revue générale de botanique (Libraire générale de l'enseignement, 1889)

Revue générale de botanique (Libraire générale de l'enseignement, 1907)

Revue générale de botanique (Libraire générale de l'enseignement, 1912)

Revue générale de botanique (Libraire générale de l'enseignement, 1914)

Revue horticole (Librairie agricole de la maison rustique, 1863)

Revue horticole (Librairie agricole de la maison rustique, 1864)

Revue horticole (Librairie agricole de la maison rustique, 1867)

Revue horticole (Librairie agricole de la maison rustique, 1872)

Revue horticole (Librairie agricole de la maison rustique, 1890)

Revue horticole (Librairie agricole de la maison rustique, 1891)

Revue horticole (Librairie agricole de la maison rustique, 1893)

Revue horticole (Librairie agricole de la maison rustique, 1896)

Revue horticole (Librairie agricole de la maison rustique, 1898)

Revue horticole (Librairie agricole de la maison rustique, 1900)

Revue horticole (Librairie agricole de la maison rustique, 1901)

Revue horticole (Librairie agricole de la maison rustique, 1904)

Revue horticole (Librairie agricole de la maison rustique, 1914)

Revue horticole (Librairie agricole de la maison rustique, 1916)

Revue scientifique du Bourbonnais et du centre de la France - Olivier, Ernest, 1844 -1914 (Impr. É. Auclaire, 1888)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1900)

ri ben zhi wu ming hui - Honda, Masaji 本田正次 1897 -1984 (san sheng tang)

River gardens; being an account of the best methods of cultivating fresh-water plants in aquaria, in such a manner as to afford suitable abodes to ornamental fish, and many interesting kinds of aquatic animals - Humphreys, Henry Noel, 1810 -1879 (S. Low, son, and co, 1857)

Roscoe S. Baldwin, fern specialist [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Roscoe S. Baldwin, 1931)

Royal Palm Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Palm Nurseries, Reasoner Bros, 1903)

Royal Palm Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Palm Nurseries, Reasoner Bros, 1904)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1936)

Rustic adornments for homes of taste - Hibberd, Shirley, 1825 -1890 (W.H. and L. Collingridge, 1895)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1924)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1931)

Saggio di algologia oceanica - Mazza, Angelo. (Tipografia del Seminario, 1905)

Saggio di algologia oceanica - Mazza, Angelo. (Tipografia del seminario, 1911)

Samen- und Pflanzen-Tauschliste des botanischen Gartens der Kgl. Technischen Hochschule Stuttgart - Technische Hochschule Stuttgart. Botanischer Garten. (Technische Hochschule in Stuttgart, 1929)

Samen-Verzeichnis des botanischen Gartens Darmstadt - Botanischer Garten Darmstadt. (1927)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1932)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1936)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1938)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1934)

Samen-Verzeichnis des botanischen Gartens in Halle a.S - Martin-Luther-Universität Halle-Wittenberg. Botanischer Garten. (Druck von Ehrhardt Karras, 1929)

Samentausch-Liste der Wilhelmagewächshäuser - Schloss Wilhelma (Stuttgart, Germany) (1936)

The Schmidt & Botley Co. [catalog] : 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Schmidt & Botley Co, 1926)

The Schmidt & Botley Co., seedsmen and florists : 1927 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Schmidt & Botley Co, 1927)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1902)

Schulflora von Österreich - Willkomm, Moritz, 1821 -1895 (A. Pichler's Witwe & Sohn, 1892)

Schwill's garden annual for 1912 : everything for the gardener, farmer, poultryman and beekeeper - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Otto Schwill & Company, 1912)

Science - American Association for the Advancement of Science. ([s.n.], 1914)

Science progress - Burdett, Henry C., Sir, 1847 -1920 (Scientific Press, 1898)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1904)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1905)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1902)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1903)

Seed catalog : season 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hermann Glieme, Inc, 1930)

Seeds and plants for the South - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Texas Seed and Floral Co, 1904)

Seeds, plants, bulbs, roses, trees, garden supplies : 1921 catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Routledge Seed & Floral Co, 1921)

Select ferns and lycopods: British and exotic - Williams, Benjamin Samuel, 1822 -1890 ([The author], 1868)

Select ferns and lycopods: British and exotic : comprising descriptions of nine hundred and fifty choice species and varieties, accompanied by directions for their management in the tropical, temperate, and hardy fernery - Williams, Benjamin Samuel, 1822 -1890 ([The author], 1873)

Selectus e seminario Horti Botanici Cracoviensis - Uniwersytet Jagielloński. Ogród Botaniczny. (Hort Botanici Gracoviensis, 1925)

Selectus e seminario Horti Botanici Cracoviensis - Uniwersytet Jagielloński. Ogród Botaniczny. (Hort Botanici Gracoviensis, 1926)

La Semaine horticole ([s.n.], 1897)

La Semaine horticole ([s.n.], 1898)

Semillas recolectadas durante ano ... y que se ofrecen a cambio de otras - Universidad de Valencia. Jardin Botanico. (Imprenta de Manuel Alufre, 1897)

Semillas recolectadas durante ano ... y que se ofrecen a cambio de otras - Universidad de Valencia. Jardin Botanico. (Imprenta de Manuel Alufre, 1909)

Semillas recolectadas durante ano ... y que se ofrecen a cambio de otras - Universidad de Valencia. Jardin Botanico. (Imprenta de Manuel Alufre, 1894)

Senescence and rejuvenescence - Child, Charles Manning, 1869 -1954 (The University of Chicago Press, 1915)

Senescence and rejuvenescence - Child, Charles Manning, 1869 -1954 (Univ. Press, 1915)