Park's illustrated flower book of choice dependable seeds, season of 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park, 1933)

Park's illustrated flower book of choice dependable seeds, season of 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1937)

Park's illustrated flower book of choice dependable seeds, season of 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1936)

Park's special fall catalog : quality bulbs and seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Co, 1939)

Parks and pleasure grounds, or, Practical notes on country residences, villas, public parks, and gardens - Smith, Charles H. J. (Reeve and Co, 1852)

Partial list of available native plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nik-Nar, 1941)

Partial list of available native plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nik-Nar, 1950)

Patterson's numbered check-list of North American plants north of Mexico - Patterson, Harry N. (Harry Norton), 1853 -1919 (Patterson, 1892)

Pearce Seed Co., rare plant nursery : offer no. 71, 1959 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pearce Seed Company, 1959)

Pearce seed company : rare plant nursery, offer no. 69, 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pearce Seed Company, 1958)

Pearce seeds, plants and bulbs : offer 45A (1946) - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1946)

Pearce seeds, plants, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1945)

Pearce seeds, plants, bulbs : offer 39A - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1943)

Peonies, French lilacs, hedge plants, delphinium, hardy phlox - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harmon Nursery, 1947)

Perennial, biennial and annual plants, iris : spring 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bright Spot Gardens, 1936)

Perennial, biennial and annual plants, iris : spring 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bright Spot Gardens, 1937)

Perennial list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Cascio Nursery, 1958)

Perennial plants and shrubs, 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1948)

Perennial plants and shrubs : spring, 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1950)

Perennial plants : catalog for spring 1941, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1941)

Perennial plants : fall, 1938, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1938)

Perennial plants : fall catalog-1954, wholesale only : our 34th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Co, 1954)

Perennial plants for the florist, the landscaper, the garden, the border, the rockery - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1935)

Perennial plants : spring 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Martin-Pratt Seed Co, 1945)

Perennial plants : spring 1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1947)

Perennial plants : spring 1948, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1948)

Perennial plants : spring 1949, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Co, 1949)

Perennial plants : spring catalog 1950, wholesale only : 30th anniversary edition - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Co, 1950)

Perennial plants : spring catalog 1951, wholesale only : our 31st year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Company, 1951)

Perennial plants : spring catalog 1952, wholesale only : our 32nd year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Company, 1952)

Perennial plants : spring catalog 1953, wholesale only : our 33rd year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Company, 1953)

Perennial plants : spring catalog 1954, our 34th year : wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Joseph F. Martin Company, 1954)

Perennial plants : wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1934)

Perennial specialties, 1943 fall trade list of perennials and rock plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1943)

Perennial specialties, spring 1945 wholesale list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1945)

Perennial specialties : wholesale list, fall 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1948)

Perennial specialties : wholesale list, fall 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1949)

Perennial specialties : wholesale list, fall 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1950)

Perennial specialties : wholesale list, fall 1951, spring 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1951)

Perennial specialties : wholesale list, fall 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1952)

Perennial specialties : wholesale list, fall 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1953)

Perennial specialties : wholesale list, fall 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1954)

Perennial specialties : wholesale list, spring 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1949)

Perennial specialties : wholesale list, spring 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1950)

Perennial specialties : wholesale list, spring 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1953)

Perennial specialties : wholesale list, spring 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1954)

Perennial specialties : wholesale list, spring 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.J. Snyder, 1955)

Perennials, a speciality : wholesale price list, fall, 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bentley's Hardy Plants, 1957)

Perennials, a specialty : wholesale price list, fall, 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bentley's Hardy Plants, 1958)

Perennials, a specialty : wholesale price list, spring, 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bentley's Hardy Plants, 1958)

Perennials and rock plants for 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1936)

Perennials and rock plants : wholesale catalogue, fall 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Shoreway Nursery, 1938)

Perennials. bulbs, shrubs, trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Crawford Gardens, 1943)

Perennials : deciduous trees, flowering shrubs, evergreens, hardy vines, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Muller-Sealey Co., Inc, 1924)

Perennials, flowering shrubs, rock plants, evergreens : 1926 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1926)

Perennials for all purposes : ground covers and hardy vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Muller-Sealey Co., Inc, 1920)

Perennials, rock plants, cut flowers, seedling annuals, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hildemere Gardens, 1935)

Perennials, rock plants, cut flowers, seedling annuals, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hildemere Gardens, 1936)

Perennials, rock plants, flowering shrubs, evergreens : 1927 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1927)

Perennials, rock plants, flowering shrubs, evergreens : 1928 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1928)

Perennials, rock plants, flowering shrubs, evergreens, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1929)

Perennials, rock-plants for 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1937)

Perennials, rock-plants for 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1938)

Perennials, rock-plants for 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1939)

Perennials, rock-plants, shrubs, evergreens, roses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Turner Bros. Nursery, 1938)

Perennials, rock-plants, shrubs, evergreens, roses, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Turner Bros. Nursery, 1936)

Perennials, rock-plants, shrubs, evergreens, roses, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Turner Bros. Nursery, 1937)

Perennials, shrubs, azaleas : wholesale trade list, fall, 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1957)

Perennials, shrubs, azaleas : wholesale trade list, spring, 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, Inc, 1958)

Perennials, shrubs, bulbs : wholesale trade list, fall, 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1956)

Perennials, shrubs, bulbs : wholesale trade list, spring, 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1957)

Perennials, shrubs, roses, bulbs : fall, 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1951)

Perennials, shrubs, roses, bulbs : retail, fall, 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1952)

Perennials, shrubs, roses, bulbs : retail, fall, 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1953)

Perennials, shrubs, roses, bulbs : retail price list, fall, 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1954)

Perennials, shrubs, roses, bulbs : retail price list, spring, 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1954)

Perennials, shrubs, roses, bulbs : retail, spring, 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1953)

Perennials, shrubs, roses, bulbs : spring, 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1952)

Perennials, shrubs, roses, bulbs : spring, 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1955)

Perennials, shrubs, roses, bulbs : spring, 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1956)

Perennials, shrubs, roses, bulbs : wholesale trade list, fall, 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1952)

Perennials, shrubs, roses, bulbs : wholesale trade list, fall, 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1954)

Perennials, shrubs, roses, bulbs : wholesale trade list, fall, 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1953)

Perennials, shrubs, roses, bulbs : wholesale trade list, fall, 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1955)

Perennials, shrubs, roses, bulbs : wholesale trade list, spring, 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1954)

Perennials, shrubs, roses, bulbs : wholesale trade list, spring, 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1953)

Perennials, shrubs, roses, bulbs : wholesale trade list, spring, 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1952)

Perennials, shrubs, roses, bulbs : wholesale trade list, spring, 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Springbrook Gardens, 1955)

Perkins Bros. 1951 catalog : potted roses, perennials, hardy asters, phlox, annuals, chrysanthemums, gladious, superior shasta daisies, daylilies, vegetable plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Bros, 1951)

Perkins Bros. flower garden news, 1940 : new and favorite varieties of perennials, annuals, roses that will help make your garden a place of beauty and joy throughout the coming season - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Bros, 1940)

Perkins Bros., Stillwater Road, Saint Paul, Minnesota - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Bros, 1942)

Perkins' flower garden news, March 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Brothers, 1938)

Perkins' flower garden news, May 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Brothers, 1938)

Perkins' Flower Gardens for 1939 : new and favorite perennials, biennials and annual plants that will help make your garden a place of beauty and a joy thruout the coming season - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins' Flower Gardens, 1939)

Perkins' flower gardens, Vol. 2, No. 2, March 1934 : perennials, annuals for your garden and rockery - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Brothers, 1934)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Pflanzenmikrochemie : ein Hilfsbuch beim mikrochemischen Studium pflanzlicher Objekte - Tunmann, Otto, 1867 -1919 (Gebrüder Borntraeger, 1913)

Die Pflanzenstoffe, botanisch-systematisch bearbeitet ; chemische Bestandteile und Zusammensetzung der einzelnen Pflanzenarten, Rohstoffe und Produkte. Phanerogamen - Wehmer, C. (Carl), 1858 -1935 (G. Fischer, 1911)

Die Pflanzenwelt Norwegens. Ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (A.W. Brögger, 1873)

Die Pflanzenwelt Norwegens : ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (1873)

Phlox, peonies, iris, etc., also a fine collection of perennials : roses, shrubs, evergreens, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frederic J. Rea, 1915)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1967)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1968)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1976)

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, 1994)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1995)

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

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1997)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2006)

Phytoneuron (Guy L. Nesom, 2013)

Phytoneuron (Guy L. Nesom, 2014)

Pittonia :a series of papers relating to botany and botanists - Greene, Edward Lee, 1843 -1915 (Doxey & Co. [etc.], 1899)

Pitzonka's Pansy Farm, Bristol, Pennsylvania - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1940)

Pitzonka's Pansy Farm, "The home of the pansy" : perennials, bulbs, rock plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1934)

Pitzonka's Pansy Farm, "The home of the pansy" : rock plants, bulbs, perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitzonka's Pansy Farm, 1933)

Planning and planting service by Turner Bros. Nursery, West Long Branch, N.J - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (William Turner's Sons, 1939)

Plant a victory garden with our hormone treated seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (St. Louis Seed Co, 1944)

Plant anatomy : from the standpoint of the development and functions of the tissues : and handbook of micro-technic - Stevens, William Chase, 1861 -1955 (P. Blakiston, 1907)

Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic - Stevens, William Chase, 1861 -1955 (P. Blakiston's Son, 1910)

Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of microtechnic - Stevens, William Chase, 1861 -1955 (P. Blakiston, 1910)

Plant associations of region two : potential plant communities of Wyoming, South Dakota, Nebraska, Colorado, and Kansas - Johnston, Barry C. (USDA Forest Service, Rocky Mountain Region, 1987)

Plant catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles Fiore Nurseries, 1940)

Plant catalogue : orchids, palms, ferns, foliage, and flowering plants, chrysanthemums, hardy plants and shrubs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitcher & Manda, 1894)

Plant immigrants - United States. Office of Foreign Seed; Plant Introduction. (Office of Foreign Seed and Plant Introduction, 1915)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1929)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1934)