Phytogeographic survey of North America. A consideration of the phytogeography of the North American continent, including Mexico, Central America and the West Indies, together with the evolution of North American plant distribution - Harshberger, John W. (John William), 1869 -1929 (W. Engelmann, 1911)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1981)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1983)

The Phytologist: a botanical journal - Irvine, Alexander, 1793 -1873 (William Pamplin, 1862)

Phytoneuron (Guy L. Nesom, 2014)

The pinus contorta vegetation of Banff and Jasper National Parks - University of Alberta. Department of Botany. (University of Alberta, 1969)

Plant and seed list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank H. Rose, 1958)

Plant biomass in the Tanana River basin, Alaska - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1995)

Plant communities of Northeastern Montana : a first approximation - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

The plant community - Churchill, Ethan D. (Reinhold Pub. Corp, 1961)

Plant community types of sand dunes and sand plains in selected areas of the boreal natural region - Alberta. Alberta Sustainable Resource Development. (The Company, 2005)

Plant diseases in Montana in 1928 - Morris, H. E. (Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture, 1929)

Plant explorations; ornamentals in southern Japan - United States. Plant Introduction Garden, Glenn Dale, Md. (U.S. Dept. of Agriculture, 1957)

Plant-geography upon a physiological basis - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1903)

Plant hardiness zone map - United States. Agricultural Research Service. (Govt. Print. Off, 1960)

Plant hardiness zone map - American Horticultural Society. (Agricultural Research Service, 1965)

Plant indicators: the relation of plant communities to process and practice - Clements, Frederic E. (Frederic Edward), 1874 -1945 (Carnegie Institution of Washington, 1920)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1923)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1942)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1968)

The plant life of Maryland - Shreve, Forrest, 1878 -1950 (Johns Hopkins Press, 1910)

Plant list of Waterloo County - Montgomery, F. H. (Frederick Howard), 1902 - (1943)

Plant lists, Maine, Vermont, New Hampshire - Perkins, Anne E., (1927)

Plant lists : Mount Katahdin - Fernald, Merritt Lyndon, 1873 -1950 (1892)

Plant materials of decorative gardening; the woody plants - Trelease, William, 1857 -1945 (The author, 1921)

Plant materials of decorative gardening; the woody plants - Trelease, William, 1857 -1945 (The author, 1917)

The Plant world - Plant World Association. (Plant World Association [etc.], 1905)

The Plant world - Plant World Association. (Plant World Association [etc.], 1909)

The Plant world - Plant World Association. (Plant World Association [etc.], 1916)

The Plant world - Plant World Association. (Plant World Association [etc.], 1917)

Plantes alpines & vivaces, 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H. Correvon & Fils, 1933)

Les plantes alpines : choix des plus belles espèces, description, station, excursions, culture, emploi - Verlot, Bernard, 1836 -1897 (J. Rothschild, 1873)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1962)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1969)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1971)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1982)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1991)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1992)

Plants collected by M.A. Barber, 1903 - Barber, M. A. (Marshall Albert), 1868 -1953 (1903)

Plants for the hardy border, the rockery and the wild garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardenside Nurseries, Inc, 1931)

Plants for the hardy border, the rockery and the wild garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardenside Nurseries, Inc, 1932)

Plants of James' Bay collected by David Potter - Potter, David, 1894 -1967 (1929)

Plants of Labrador and Baffin Land coll. C.S. Sewall, 1927-'28 - Sewall, Charles Summers, 1875 -1957 (1927)

The plants of Michigan; simple keys for the identification of the native seed plants of the state - Gleason, Henry A. (Henry Allan), 1882 -1975 (G. Wahr, 1918)

The plants of Prince Edward Island - Erskine, D. S. (David Sterling) (Plant Research Institute, Research Branch, Canada Dept. of Agriculture, 1960)

The plants of Prince Edward Island - Erskine, D. S. (David Sterling) (Research Branch, Agriculture Canada, 1985)

Plants of Riding Mountain National Park, Manitoba - Canadian Parks Service. (Research Branch, Agriculture Canada, 1988)

Plantsman - New Hampshire Plant Growers' Association. (1991)

Plantsman - New Hampshire Plant Growers' Association. (1995)

Plantsman - New Hampshire Plant Growers' Association. (1998)

Polk Inlet draft environmental impact statement : Ketchikan Pulp Company long-term timber sale contract. Vol. I - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, Tongass National Forest, 1993)

Polk Inlet timber sale : final environmental impact statement. Vol. I - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, Tongass National Forest, 1995)

Popular official guide to the New York Zoological Park - New York Zoological Society. (New York Zoological Society, 1913)

Population dynamics of island populations of subarctic Clethrionomys rutilus and Peromyscus maniculatus - Burns, Gordon R. (Gordon Russell), 1954 - (University of Alberta, Dept. of Zoology, 1980)

Port Houghton/Cape Fanshaw timber sale project : revised draft environmental impact statement. V. 1, EIS - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, Alaska Region, 1998)

Postelsia : the year book of the Minnesota Seaside Station - Minnesota Seaside Station. (Pioneer Press, 1906)

Postglacial vegetational changes along an elevational gradient in the Adirondack Mountains (New York) : a study of plant macrofossils - Biological Survey (N.Y.) (University of the State of New York, State Education Dept., New York State Museum, Biological Survey, 1989)

A practical guide to garden plants, containing descriptions of the hardiest and most beautiful annuals and biennials, hardy herbaceous and bulbous perennials, hardy water and bog plants, flowering and ornamental trees and shrubs, conifers; hardy ferns; hardy bamboos and other ornamental grasses. Also the best kinds of fruits and vegetables that may be grown in the open air in the British Isles with full and practical instruction as to culture and propagation - Weathers, John, 1867 -1928 (Longmans, Green, 1901)

Preliminary classification of forest vegetation of the Kenai Peninsula, Alaska - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990)

A preliminary classification of plant communities in the central Parkland natural sub-region of Alberta - Alberta. Alberta Sustainable Resource Development. (Geowest Environmental Consultants Ltd, 2002)

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A preliminary classification of the Rocky Mountain shrubland communities of Alberta - Alberta. Alberta Environment. (Alberta Environment, 2000)

Preliminary inventory of Canadian weeds - Crompton, Clifford W. (Agriculture Canada, Research Branch, 1988)

A preliminary list of Maine fungi - Ricker, Percy Leroy, 1878 -1973 (1902)

Preliminary list of the mammals of New York - Miller, Gerrit S. Jr. (Gerrit Smith), 1869 -1956 (University of the State of New York, 1899)

A preliminary list of the parasitic fungi of Idaho - United States. Division of Mycology; Disease Survey. (Division of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture, 1936)

Preliminary plant associations of the Southern Oregon Cascade Mountain province - Atzet, Thomas. (U.S.D.A. Forest Service, Pacific Northwest Region, Siskiyou National Forest, 1990)

Preliminary price list of special plants : for garden economy, floral art and conservatory - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Sunningdale Nurseries, 1957)

Price list, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wild Flowers (Inc.), 1932)

Price list : fall 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Co, 1928)