Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2006)

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, 2010)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1970)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1971)

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 Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1967)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1977)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1979)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 2018)

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, 1842)

ProHort - Center for Urban Horticulture (1986)

ProHort - Center for Urban Horticulture (1989)

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

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2012)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2013)

pu yang zhi wu zhi - Zhang, Junpu, Wu Hongchen, Zhu Xuewen & Ma Yipin (zhong guo ke xue ji shu chu ban she, 1996)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1929)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1931)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1932)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1930)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1937)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1936)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1956)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1938)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1939)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1940)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1942)

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

qing zang gao yuan yan jiu heng duan shan kao cha zhuan ji - Zhongguo ke xue yuan. Qing zang gao yuan zong he ke xue kao cha dui (yun nan ren min chu ban she, 1983)

Quarterly summary of re-identifications, January, February, March 1963 : Summary No. 12 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Rain forest in the city : Bukit Timah Nature Reserve, Singapore - Botanic Gardens (Singapore) (National Parks Board, Singapore Botanic Gardens, 1995)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2001)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2002)

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

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)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2004)

Rapid inventories, biological and social - Field Museum of Natural History. (Field Museum, 2008)

Rare and endangered plants of Puerto Rico : a committee report - United States. Soil Conservation Service. (U.S. Dept. of Agriculture, Soil Conservation Service in cooperation with the Department of Natural Resources, Commonwealth of Puerto Rico, 1975)

Rare and endemic trees of Puerto Rico and the Virgin Islands - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, 1980)

Rare and Threatened Plants of Cuba: ex-situ conservation in Botanic gardens (1989)

Rare plants : Christmas - 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rare Plant Club, 1950)

Relation of auxin metabolism to the rooting of tea - Figueroa, Raul H., 1933 - (1966)

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

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1953)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1954)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1944)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1956)

Report on investigations made in Java in the year 1902 - Merrill, Elmer D. (Elmer Drew), 1876 -1956 (Bureau of Public Printing, 1903)

Report on the vegetation of the Island Ooryongto or Dagelet Island, Corea, February, 1818 [i.e. 1918] - Nakai, Takenoshin, 1882 - (Govt. of Chosen, 1919)

Results of the Archbold Expeditions. No. 99, Vegetation changes in the Lake Mamsin area, Saruwaged Plateau, New Guinea - Costin, A. B. (American Museum of Natural History, 1977)

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.], 1898)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 2004)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 2016)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1939)