Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1979)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1987)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1985)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2005)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2008)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2018)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2016)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1867)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1879)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1885)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1889)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1955)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1962)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1966)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1969)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1972)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1975)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1977)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1983)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1984)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1988)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1990)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1991)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1993)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1995)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1996)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1997)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2000)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1894)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1905)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1915)

Proceedings of the Pacific Coast Entomological Society - Pacific Coast Entomological Society ([The Society], 1901)

Proceedings of the San Diego Society of Natural History - San Diego Society of Natural History. (San Diego Society of Natural History, 1990)

Proceedings of the San Diego Society of Natural History - San Diego Society of Natural History. (San Diego Society of Natural History, 1992)

Proceedings of the second annual Antelope States Workshop : February 16-17, 1966, Denver, Colorado - United States. Soil Conservation Service. ([Colorado Game, Fish, and Parks Department], 1966)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1903)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1942)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1954)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1966)

Proceedings, Symposium on Cheatgrass Invasion, Shrub Die-off and Other Aspects of Shrub Biology and Management : Las Vegas, NV, April 5-7, 1989 - Intermountain Research Station (Ogden, Utah) (Intermountain Research Station, Forest Service, U.S. Dept. of Agriculture, 1990)

Proceedings–Symposium on Shrub Ecophysiology and Biotechnology, Logan, Utah, June 30-July 2, 1987 - Intermountain Research Station (Ogden, Utah) (Intermountain Research Station, Forest Service, U.S. Dept. of Agriculture, 1989)

Proceedings : Symposium on the Biology of Artemisia and Chrysothamnus : Provo, Utah, July 9-13, 1984 - Intermountain Research Station (Ogden, Utah) (Intermountain Research Station, Forest Service, U.S. Dept. of Agriculture, 1986)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1857)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1873)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1874)

Programmatic environmental assessment for containment/eradication of noxious plants tiered to the Northwest Area Noxious Weeds Control Program FEIS, 1985, Lewistown District - Montana - United States. Bureau of Land Management. (The District, 1986)

Programmatic environmental impact statement vegetation treatments using herbicides on Bureau of Land Management lands in 17 western states : draft - United States. Bureau of Land Management. (U.S. Dept. of the Interior, Bureau of Land Management, 2005)

Programmatic environmental impact statement vegetation treatments using herbicides on Bureau of Land Management lands in 17 western states : final - United States. Bureau of Land Management. (U.S. Dept. of the Interior, Bureau of Land Management, 2007)

Progress report : Trickle Mountain research area [report no. 2] - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Denver Service Center, 1978)

Progress report : Trickle Mountain research study [report no. 2] - Colorado State University. (U.S. Department of the Interior, Bureau of Land Management, Denver Service Center, 1978)

Pronghorn antelope population and habitat management in the northwestern Great Basin environments - U.S. Fish; Wildlife Service ([publisher not identified], 1980)

Pronunciation of plant names - Garden Club of America. (Reproduced and printed by National Process Company], 1922)

Proposed Dolores National Wild and Scenic River : final environmental statement - United States. Bureau of Outdoor Recreation. Mid-Continent Region. (U.S. Department of the Interior, Bureau of Outdoor Recreation, Mid-Continent Region, 1976)

Proposed revisions to grazing regulations for the public lands : final environmental impact statement FES 04-39 - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, 2005)

The protection of small grains, other than wheat, rice, or sorghums, 1979-April 1990 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1990)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1890)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1911)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1979)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2010)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1923)

Publication / the Herbarium, Department of Biological Sciences, University of California, Santa Barbara - University of California, Santa Barbara. (the Herbarium, 1984)

Publication / the Herbarium, Department of Biological Sciences, University of California, Santa Barbara - University of California, Santa Barbara. (the Herbarium, 1985)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1987)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1948)

Quino checkerspot butterfly (Euphydryas editha quino) : draft recovery plan - U.S. Fish; Wildlife Service. Region 1. (Region 1, U.S. Fish and Wildlife Service, 2001)

Range and wildlife habitat evaluation : a research symposium, Flagstaff and Tempe, Ariz., May 1968 - United States. Branch of Range; Wildlife Habitat Ecology; Management Research. (U.S. Dept. of Agriculture, Forest Service, 1970)

Range condition : a classification of the scabland bunchgrass forage type in the Palouse Rock Lake Soil Conservation District - United States. Soil Conservation Service. (U.S. Dept. of Agriculture, Soil Conservation Service, 1946)

Range improvement notes - United States. Forest Service. (Forest Service, U.S. Dept. of Agriculture, Intermountain Region, 1956)

Range management and its ecological basis in the ponderosa pine type of Arizona : the status of our knowledge - Clary, Warren P. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1975)

Range management in the state of Washington - United States. Bureau of Plant Industry. (Gov't print. off, 1905)

Range plant handbook - Dayton, William A. (William Adams), 1885 - (U. S. Govt. print. off, 1937)

Range plant handbook - Dayton, William A. (William Adams), 1885 - (U.S. Govt. print. off, 1937)

Range plants of Arizona and New Mexico : names, symbols and notations - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S.D.A, 1958)

Rapid ecological assessment of selected state lands in southcentral Montana for plant species of special concern - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1993)

Rare native plants, shrubs, bulbs, Alpines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oregon Gardens, 1929)

Rare plant inventory and plant community descriptions of the Sweet Grass Hills, Proposed Area of Critical Environmental Concern (PACEC), Toole and Liberty Counties, Montana - United States. Bureau of Land Management. (Western Technology and Engineering, Inc, 1989)

Rare plant inventory of the East Pioneer Mountains, U.S.D.A. Forest Service, Region 1, Beaverhead National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1991)

Reclamation of disturbed alpine lands : a literature review - Alberta. Land Conservation; Reclamation Council. (Alberta Land Conservation and Reclamation Council, Reclamation Research Technical Advisory Committee, 1990)

Recognizing plant families of the west : field guide - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, 2021)

Record of decision and Lake Havasu Field Office approved resource management plan - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Lake Havasu Field Office, 2007)

A record of the fungi named by J.B. Ellis - United States. Bureau of Plant Industry, Soils,; Agricultural Engineering. (Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, U.S. Dept. of Agriculture, 1952)

Records of general science

Reduction of all the genera of plants contained in the Catalogus plantarum Americæ septentrionalis, of the late Dr. Muhlenberg, to the natural families of Mr. de Jussieu's system : For the use of the gentlemen who attended the course of elementary and philosophical botany in Philadelphia, in 1815 - Correia da Serra, José Francisco, 1750 -1823 (Published by Solomon W. Conrad, no. 87, Market Street, 1815)

Regiones terrestres prioritarias de México - Aguilar Zúñiga, Claudia (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2000)

Reise in das innere Nord-America in den Jahren 1832 bis 1834 - Wied, Maximilian, Prinz von, 1782 -1867 (Bei J. Hœlscher, 1841)

Reliquiae Baldwinianae : selections from the correspondence of the late William Baldwin with occasional notes, and a short biographical memoir - Muhlenberg, Henry, 1753 -1815 (Kimber and Sharpless, 1843)

Reliquiæ Baldwinianæ: selections from the correspondence of the late William Baldwin ... with occasional notes, and a short biographical memoir - Muhlenberg, Henry, 1753 -1815 (Kimber and Sharpless, 1843)

Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

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