Procès-verbaux - Société Linnéenne de Bordeaux. (1917)

Prodromus der Flora von Böhmen. Enthaltend die Beschreibungen und Verbreitungsangaben der wildwachsenden und im Freien kultivirten Gefässpflanzen des Königreiches ... - Celakovský, Ladislav Josef, 1834 -1902 (Selbstverlag des Comité's, 1867)

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

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

Pteridologist - British Pteridological Society. (The Society, 1986)

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

Pteridologist - British Pteridological Society. (The Society, 1988)

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, 1997)

Pteridologist - British Pteridological Society. (The Society, 1998)

Pteridologist - British Pteridological Society. (The Society, 1999)

Pteridologist - British Pteridological Society. (The Society, 2000)

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

Pteridologist - British Pteridological Society. (The Society, 2003)

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

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

Pteridologist - British Pteridological Society. (The Society, 2010)

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

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

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

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)

Pteridologist - British Pteridological Society. (The Society, 2019)

Pteridologist - British Pteridological Society. (The Society, 2020)

Ptéridophytes - Tardieu-Blot, Mme., (Laure) 1902 -1998 (1969)

Publication. Field Columbian Museum. Botanical series - Field Columbian Museum. (Field Columbian Museum, 1896)

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

Publications in botany - National Museum of Natural Sciences (Canada) (The Museum, 1981)

Putney's 1955 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1955)

The Quarterly journal of science (J. Churchill and Sons, etc, 1865)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2003)

Rare alpines and rock plants : 1954 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mayfair Nurseries, 1954)

Rare alpinines and rock plants : 1953 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mayfair Nurseries, 1953)

Reading Naturalist. Reading - Reading Natural History Society. (1960)

Reading Naturalist. Reading - Reading Natural History Society. (1966)

Reading Naturalist. Reading - Reading Natural History Society. (1969)

Reading Naturalist. Reading - Reading Natural History Society. (1982)

Reading Naturalist. Reading - Reading Natural History Society. (1987)

Reading Naturalist. Reading - Reading Natural History Society. (2001)

Records of the Botanical Survey of India - Botanical Survey of India. (Office of Supt. of Govt. Print., India, 1893)

Records of the Queen Victoria Museum Launceston - Queen Victoria Museum (Launceston, Tas.) (The Museum, 1996)

Repertorium annuum literaturae botanicae periodicae - Bemmelen, J. A. van. (Erven Loosjes, 1873)

Report - British Columbia Provincial Museum. (Printed by W.H. Cullin, 1928)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1900)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1920)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1933)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1871)

Report of the Geological Survey of Ohio - Geological Survey of Ohio. (Nevins & Myers, state printers, 1893)

Report of the geological survey of Ohio - Geological Survey of Ohio. (Nevins & Meyers, 1893)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1901)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1909)

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)

Report to the trustees of Kosciusko State Park on a reconnaisance natural history survey of the Park, January-February 1946 - Linnean Society of New South Wales. (The Committee?, 1946)

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

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)

Retail price list, 1934 (trade 331/3%) - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gillett's Fern and Flower Farm, 1934)

Revised checklist of New York State plants - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1997)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1944)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1970)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1976)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1883)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1885)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1886)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1888)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1893)

Revue des sciences naturelles de l'ouest - Institut international de bibliographie scientifique. (Revue des sciences naturelles de l'ouest, 1895)

Revue des travaux scientifiques - France. Ministère de l'Instruction publique (Imprimerie nationale, 1896)

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

Revue horticole (Librairie agricole de la maison rustique, 1880)

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

Revue scientifique du Bourbonnais et du centre de la France - Olivier, Ernest, 1844 -1914 (Impr. É. Auclaire, 1908)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1902)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1952)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1953)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1962)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1968)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1973)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1975)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1979)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1980)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1981)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1985)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1987)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1992)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1996)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1997)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2003)

Robert Dick, baker of Thurso, geologist and botanist - Smiles, Samuel, 1812 -1904 (Harper, 1878)

Robert Dick, baker, of Thurso, geologist and botanist - Smiles, Samuel, 1812 -1904 (J. Murray, 1878)

Robert Dick, baker, of Thurso, geologist and botanist - Smiles, Samuel, 1812 -1904 (Harper & Brothers, 1900)

The rock garden - Jenkins, Edmund Howard, 1856 -1921 (Country life, ltd. [etc.], 1920)

Rock garden plants exclusively - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paramount Gardens, 1945)

Rock plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Anthon, 1931)

Rock plants and iris - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Starker, 1934)

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

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1870)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1932)

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

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 1988)

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 1998)

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 2011)

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 2021)

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 2022)

Sandpoint Ranger District noxious weed control project : draft environmental impact statement - Idaho Panhandle National Forests. Sandpoint Ranger District. (Sandpoint Ranger District, 1998)

Sandpoint Ranger District noxious weed control project : final environmental impact statement - United States. Forest Service. Northern Region. (U.S. Dept. of Agriculture, Forest Service, Northern Region, 1998)

Sandusky flora. A catalogue of the flowering plants and ferns growing without cultivation in Erie county, Ohio, and the peninsula and islands of Ottawa County - Moseley, Edwin Lincoln, 1865 -1948 (Clapper, 1899)

Sandusky flora. A catalogue of the flowering plants and ferns growing without cultivation, in Erie County, Ohio, and the peninsula and islands of Ottawa County - Moseley, Edwin Lincoln, 1865 -1948 (Press of Clapper Printing Co, 1899)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1919)