Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1978)

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

Proceedings of the Hawaiian Entomological Society - Hawaiian Entomological Society. (Hawaiian Entomological Society, 1921)

Proceedings of the Hawaiian Entomological Society - Hawaiian Entomological Society. (Hawaiian Entomological Society, 1922)

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, 1904)

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

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

Pteridologist - British Pteridological Society. (The Society, 1987)

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

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

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

Pteridologist - British Pteridological Society. (The Society, 2012)

Pteridologist - British Pteridological Society. (The Society, 2013)

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

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

Pteridophyta und Anthophyta - Wettstein, Richard, Ritter von Westersheim, 1863 -1931 (K.K. Hof- und Staatsdruckerei, 1908)

Ptéridophytes : suivis d'une carte des localités du Gabon - Hallé, Nicolas (1964)

Publication. Field Columbian Museum. Botanical series - Field Columbian Museum. (Field Columbian Museum, 1902)

Publication. Field Columbian Museum. Botanical series - Field Columbian Museum. (Field Columbian Museum, 1900)

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

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1961)

The Queensland flora - Bailey, Frederick Manson 1827 -1915 (Printed by H. J. Diddams & co, 1902)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2006)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2005)

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

Records of the Auckland Institute and Museum - Auckland Institute; Museum. (Auckland Institute and Museum, 1996)

Reflections on the phenomenon of rejuvenescence in nature, especially in the life and development of plants - Braun, Alexander, 1805 -1877 (1851)

Repertorium specierum novarum regni vegetabilis. Beihefte (Verlag des Repertoriums, 1922)

Report - Chicago Natural History Museum. (1910)

Report of the Botanist - New York (State). State Botanist. (James B. Lyon, State Printer, 1867)

Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Neill, 1885)

Reports of the Survey. Botanical series - Geological; Natural History Survey of Minnesota. (1892)

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)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1921)

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

Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... - Kuntze, Otto, 1843 -1907 (A. Felix [etc.], 1891)

Revista de la Academia Canaria de Ciencias - Academia Canaria de Ciencias. (Academia Canaria de Ciencias, 2000)

Revista do Museu Paulista - Museu Paulista (Museu Paulista, 1918)

Revue critique de paléozoologie et de paléophytologie (M. Cossman, 1897)

Revue des questions scientifiques - Société scientifique de Bruxelles. (Société scientifique de Bruxelles, 1903)

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

Revue horticole (Librairie agricole de la maison rustique, 1903)

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

Revue horticole (Librairie agricole de la maison rustique, 1909)

Revue horticole (Librairie agricole de la maison rustique, 1920)

Rhododendrons, boxwood, azaleas, clematis, novelties, bay trees, hardy plants, evergreens : novelties bulbs, cannas novelties, palms, araucarias, ferns, vines, orchids, flowering shrubs, ornamental grasses and trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1902)

Rhododendrons, roses, clematis, azaleas, bulbs, hardy plants, bay trees, evergreens : palms, araucarias, ferns, vines, orchids, flowering shrubs, ornamental grasses and trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1901)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1955)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1976)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1986)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1950)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2002)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2010)

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

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. (Reasoner Bros, 1906)

Royal Palm Nurseries, 1928 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Palm Nurseries, Reasoner Brothers, 1928)

Royal Poinciana Nurseries (Incorporated) [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Poinciana Nurseries (Incorporated), 1916)

Royal Poinciana Nurseries (Incorporated) [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Poinciana Nurseries (Incorporated), 1917)

Royal Poinciana Nurseries (Incorporated) [catalog]. 1918 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Poinciana Nurseries (Incorporated), 1918)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1896)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1897)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1898)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1903)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1905)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1914)

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)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1931)

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], 1934)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1939)

Samen-Verzeichnis des Botanischen Gartens der Universitãt Greifswald - Ernst-Moritz-Arndt-Universität Greifswald. Botanischer Garten. ([Botanischer Garten], 1905)

Samen-Verzeichnis des Botanischen Gartens der Universitãt Greifswald - Ernst-Moritz-Arndt-Universität Greifswald. Botanischer Garten. ([Botanischer Garten], 1893)

Samen-Verzeichnis des botanischen Gartens in Halle a.S - Martin-Luther-Universität Halle-Wittenberg. Botanischer Garten. (Druck von Ehrhardt Karras, 1908)

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

Seed and plant annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1907)

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 - D.M. Ferry & Co. (D.M. Ferry & Co, 1881)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1899)

Seed annual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1900)

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 annual, 1881 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (D.M. Ferry & Co, 1881)

Seed annual, 1882 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (D.M. Ferry & Co, 1882)

Seed annual, 1901 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cox Seed and Plant Co, 1901)

Seeds and plants for the South - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Texas Seed and Floral Co, 1905)

Seeds and plants for the South - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Texas Seed and Floral Co, 1906)

Seeds, plants & bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitcher & Manda, United States Nurseries, 1896)

Seeds, plants and bulbs for southern planting - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Texas Seed and Floral Co, 1901)

Seeds, plants, nursery stock : 1918 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harris Seed Co, 1918)

Semi-annual trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Good & Reese Co, 1900)

Shokubutsu-mei-i - Matsumura, Jinzo, 1856 -1928 (Maruzen Company, Ltd, 1916)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1998)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 2002)

[Siebrecht & Wadley materials] - Siebrecht & Wadley. (1886)

Sitzungsberichte und Abhandlungen - "Flora", Sächsische Gesellschaft für Botanik und Gartenbau, Dresden - "Flora", Sächsische Gesellschaft für Botanik und Gartenbau, Dresden. ("Flora", 1907)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1975)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1877)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1915)

Some ornamental shrubs for the Tropics - Hume, Edward Putnam, 1911 - (U.S. Govt. Print. Off.], 1951)

Species filicum; being descriptions of the known ferns, particularly of such as exist in the author's herbarium, or are with sufficient accuracy described in works to which he has had access; accompanied with numerous figures - Hooker, William Jackson, Sir, 1785 -1865 (W. Pamplin, 1862)

Spring 1897 : horticultural guide - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Currie Bros, 1897)

Spring 1899 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Storrs & Harrison Co, 1899)

Spring catalogue, 1907 : seeds, plants, fruit trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.M. Sanborn, 1907)

Spring trade list 1911 : for florists, nurserymen and dealers only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Good & Reese Co, 1911)

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 (The Macmillan Co.; [etc., etc.], 1916)

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)

Standardized plant names; a catalogue of approved scientific and common names of plants in American commerce - Olmsted, Frederick Law, 1870 -1957 (1923)

Sunset Seed and Plant Co. : 1896 - Sunset Seed; Plant Co. (Sunset Seed and Plant Co, 1896)

[Sunset Seed and Plant Co. materials] - Sunset Seed; Plant Co. (1893)

Sunset seeds, plants - Sunset Seed; Plant Co. (Sunset Seed and Plant Co, 1897)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1979)

Symbolae Antillanae,seu, Fundamenta florae Indiae Occidentalis - Urban, Ignaz, 1848 -1931 (Fratres Borntraeger ;Paul Klincksieck, 1903)

Symbolae Antillanae,seu, Fundamenta florae Indiae Occidentalis - Urban, Ignaz, 1848 -1931 (Fratres Borntraeger ;Paul Klincksieck, 1898)

Symbolae Antillanae,seu, Fundamenta florae Indiae Occidentalis - Urban, Ignaz, 1848 -1931 (Fratres Borntraeger ;Paul Klincksieck, 1923)

Synopsis filicum; or, A synopsis of all known ferns, including the Osmundaceae, Schizaeaceae, Marattiaceae, and Ophioglossaceae (chiefly derived from the Kew herbarium) Accompanied by figures representing the essential characters of each genus - Baker, John Gilbert, 1834 -1920 (R. Hardwicke, 1874)

Synopsis filicum; or, A synopsis of all known ferns, including the Osmundaceæ, Schizæsveæ, Marattiaceæ, and Ophioglossaceæ (chiefly derived from the Kew herbarium) - Baker, John Gilbert, 1834 -1920 (R. Hardwicke, 1868)

Systematic fern-list: a classified list of the known ferns of the United States of America, with the geographical range of the species - Eaton, Daniel Cady, 1834 -1895 (Tuttle, Morehouse & Taylor, printers, 1880)

Tentamen Pteridographiae, seu genera filicacearum praesertim juxta venarum decursum et distributionem exposita - Presl, K. B. 1794 -1852 (Typis Filiorum Theophili Haase, 1836)

Texseed brand seeds & poultry supplies 1910 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Texas Seed and Floral Co, 1910)

Textbook of botany - Tiffany, L. H. (Lewis Hanford), 1894 -1965 (Harper & brothers, 1940)

Teysmannia (G. Kolff, 1899)

Teysmannia (G. Kolff, 1907)

The journal of horticulture (1895)

The journal of horticulture (1896)