Park's flower book of choice dependable seeds : season of 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1946)

Park's flower book : planting time supplement 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Co, 1958)

Park's flower book : planting time supplement 1959 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Co, 1959)

Park's flower book : spring 1943, seventy-fifth Anniversary - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1943)

Park's flower book : spring 1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1947)

Park's flower book : supplement 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Geo. W. Park Seed Company, 1945)

Parthenogenesis und Apogamie im Pflanzenreiche - Winkler, Hans, 1877 - (G. Fischer, 1908)

Paxton's Botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms. New ed. including all the new plants up to the present year - Paxton, Joseph, Sir, 1803 -1865 (Bradbury, Evans, & co, 1868)

The Peach : the Kansas peach ... - Barnes, William H. (W.Y. Morgan, state printer], 1899)

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)

Pehr Kalms Resa till Norra Amerika - Kalm, Pehr, 1716 -1779 (Tidnings & tryckeri-aktiebolagets tryckeri, 1904)

Peonies, hardy garden perennials, ornamental evergreens, shade trees, shrubs : 1938, superseding all previous issues - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cherry Hill Nurseries, 1938)

Peonies, hardy garden perennials, ornamental evergreens, shade trees, shrubs : 1936, superseding all previous issues - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cherry Hill Nurseries, 1936)

Peonies, hardy garden perennials, ornamental evergreens, shade trees and shrubs : 1935 issue superseding all previous issues - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thurlow's and Stranger, Inc, 1935)

Peonies, hardy garden perennials, ornamental evergreens, shade trees, shrubs : 1937, superseding all previous issues - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cherry Hill Nurseries, 1937)

Peonies, irises and perennials : 1927 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Crawford Gardens, 1927)

Peonies, irises and perennials : spring 1924 catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Crawford Gardens, 1924)

Peonies, irises, lilies, daylilies : the specialists' selection of - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Shrewsbury Gardens, 1956)

Peony list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (August Lindemann, 1945)

Perennial & shrub handbook-catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Martin Viette Nurseries, 1960)

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

Perennial border plants, list No. 10 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (White & Johnson Co, 1933)

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

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 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 from all over the world, rock plants and floral novelties : fall 1932 spring 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1932)

Perennial plants from all over the world, rock plants and floral novelties : fall 1930, spring 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1930)

Perennial plants from all over the world, rock plants and floral novelties : fall, 1931 spring, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1931)

Perennial plants from all over the world, rock plants and floral novelties : fall 1929, spring 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1929)

Perennial plants, rose bushes, bulbs, hardy chrysanthemums : spring 1953 catalog, new low prices for northern grown hardy plants, new perennials for 1953, flame verbena, delphenium astolate, new red lyondel hemerocallis, new Canadian giant chrysanthemums, new bristol's chrysanthemums, the above and others you will find in this catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gartman's Gardens, 1953)

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

Perennial price list for spring 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Genesee Valley Gardens, 1929)

Perennial price list for spring 1929-1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Genesse Valley Gardens, 1929)

Perennials, annuals, roses, potted shrubbery : 1960 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perkins Bros. Garden Center, 1960)

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 in your garden - Canada. Agriculture Canada (Agriculture Canada, 1983)

Perennials, rock plants, cut flowers, seedling annuals, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hildemere Gardens, 1941)

Perennials, rock plants, cut flowers, seedling annuals, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hildemere Gardens, 1940)

Perennials, rock plants, cut flowers, seedling annuals, bulbs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hildemere Gardens, 1939)

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

Perennials, rock-plants, roses, shrubs, evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (William Turner's Sons, 1934)

Perennials, rock-plants, roses, shrubs, evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Turner Bros. Nursery, 1935)

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)

Perry Seed Company, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perry Seed Company, 1931)

Perry Seed Company, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perry Seed Company, 1932)

Perry Seed Company, successors to Fiske Seed Company : 1930 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perry Seed Company, 1930)

Petrie Landscape Nurseries : roses, evergreens, shrubs, fruit stocks, vines, trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Petrie Landscape Nurseries, 1959)

Pflanzenbiologische Untersuchungen : nebst algologischen Schluszbemerkungen - Hansgirg, Antonin, 1854 -1917 (Alfred Hölder, 1904)

Philadelphia flower & garden show - Pennsylvania Horticultural Society. (The Society, 1976)

Philadelphia flower show - Pennsylvania Horticultural Society. (The Society, 1969)

Philadelphia flower show - Pennsylvania Horticultural Society. (The Society, 1970)

Philadelphia flower show - Pennsylvania Horticultural Society. (The Society, 1993)

Philadelphia flower show - Pennsylvania Horticultural Society. (The Society, 1995)

Philadelphia flower show - Pennsylvania Horticultural Society. (The Society, 1997)

PHS news - Pennsylvania Horticultural Society. (The Society, 1965)

PHS news - Pennsylvania Horticultural Society. (The Society, 1990)

PHS news - Pennsylvania Horticultural Society. (The Society, 1991)

PHS news - Pennsylvania Horticultural Society. (The Society, 1992)

PHS news - Pennsylvania Horticultural Society. (The Society, 1993)

PHS news - Pennsylvania Horticultural Society. (The Society, 1994)

PHS news - Pennsylvania Horticultural Society. (The Society, 1995)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2022)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2023)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2021)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1957)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1961)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1959)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1972)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1975)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1986)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1991)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1992)

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)

Phytoneuron (Guy L. Nesom, 2010)

Phytoneuron (Guy L. Nesom, 2014)

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 this year, 1943 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Powell Seed Store, 1943)

Plant book : White Flower Farm, Litchfield, Connecticut, 1960 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (White Flower Farm, 1960)

Plant book : White Flower Farm, Litchfield, Connecticut, 1961 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (White Flower Farm, 1961)