The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1981)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1983)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1985)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1988)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 1984)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 1988)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 1991)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 1998)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 1999)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 2000)

Green thumb news - Denver Botanic Gardens. (Educational Dept., Denver Botanic Gardens, Inc.], 2001)

Gregory's honest seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.J.H. Gregory & Son, Inc, 1929)

Grundzüge der wissenschaftlichen Botanik : nebst einer methodologischen Einleitung als Anleitung zum Studium der Pflanze - Schleiden, M. J. (Matthias Jacob), 1804 -1881 (Verlag von Wilhelm Engelmann, 1842)

Grundzüge der wissenschaftlichen Botanik, nebst einer methodologischen Einleitung also Anleitung zum Studium der Pflanze - Schleiden, M. J. (Matthias Jacob), 1804 -1881 (W. Engelmann, 1861)

Guide du botaniste en Belgique : (plantes vivantes et fossiles) - Crépin, François, 1830 -1903 (G. Mayolez, 1878)

The Gull - Audubon Association of the Pacific. (Golden Gate Audubon Society, 1961)

The Gull - Audubon Association of the Pacific. (Golden Gate Audubon Society, 1963)

The Gull - Audubon Association of the Pacific. (Golden Gate Audubon Society, 1991)

The Gull - Audubon Association of the Pacific. (Golden Gate Audubon Society, 1996)

H. W. Buckbee, Rockford, Ill., 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.W. Buckbee, 1937)

H. W. Buckbee seed and plant guide : 1922 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.W. Buckbee, 1922)

Habitat characteristics of the Silver Lake Mule Deer Range - Dealy, J. Edward. (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, 1971)

Hallauer's hardy herbaceous plants, bulbs, and dahlias : spring 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (N.A. Hallauer, 1932)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1888)

Hamilton's home garden catalogue, 1934 / Hamilton Seed & Coal Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hamilton Seed & Coal Co, 1934)

Hamilton's home garden catalogue, 1935 / Hamilton Seed & Coal Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hamilton Seed & Coal Co, 1935)

Hammonassett Gardens, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hammonassett Gardens, 1931)

Hampel's Gartenbuch für Jedermann : Anleitung zur praktischen Ausübung aller Zweige der Gärtnerei : aus der Praxis für die Praxis : mit 198 in den Text gedruckten Abbildungen - Kunert, Fritz, 1863 -1948 (Verlagsbuchhandlung Paul Parey, 1902)

Hand book and catalogue of pot grown rock plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mayfair Nurseries, 1948)

Hand-book of trees and hardy plants. 1917 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas Meehan & Sons, 1917)

Hand-book of trees and hardy plants : 1916 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas Meehan and Sons, 1916)

Handbook and catalog of pot grown rock plants for 1950 and 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mayfair Nurseries, 1950)

Handbook of native woody plants of the United States - United States. Soil Conservation Service. (Soil Conservation Service, 1936)

Handbook of the British flora; a description of the flowering plants and ferns indigenous to, or naturalized in, the British Isles - Bentham, George, 1800 -1884 (L. Reeve, 1858)

Handy book of horticulture; an introduction to the theory and practice of gardening - Hayes, Francis Carlile. (Murray, 1901)

Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Robert Hardwicke, 1868)

Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Robert Hardwicke, 1893)

Hardy deciduous and evergreen trees, vines, shrubs, roses, perennials, fruits, etc. : 1924 and 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Company, 1924)

Hardy deciduous and evergreen trees, vines, shrubs, roses, perennials, fruits, etc. [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Co, 1926)

Hardy deciduous and evergreen trees, vines, shrubs, roses, perennials, fruits, etc. : 1924 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Co, 1924)

Hardy deciduous and evergreen trees, vines, shrubs, roses, perennials, fruits, etc. : 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Company, 1925)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2011)

Hardy ferns–flowers : 1924-1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1924)

Hardy ferns, wild and perennial flowers, evergreens : 1927-28 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1927)

Hardy ferns, wild and perennial flowers, evergreens, rock garden plants : 1907-1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1933)

Hardy ferns, wild and rock garden plants, evergreens, 1936 wholesale trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1936)

Hardy ferns, wild and rock garden plants, evergreens, 1937 wholesale trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1937)

Hardy ferns, wild and rock garden plants, evergreens, hardy plants for better homes and gardens : 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1931)

Hardy field grown plants : fall and spring trade list, 1936-1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Superior View Farm, 1936)

Hardy herbaceous perennials for season 1930-1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (C.U. Liggit, 1930)

Hardy herbaceous plants. Price list No. 1, spring 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Four O'Clock Garden Nursery, 1927)

Hardy herbaceous plants : wholesale catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Bulb Co, 1934)

Hardy native and imported alpines and perennials : retail catalog 1944 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1944)

Hardy native and imported alpines and perennials : retail catalog, 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Saxton & Wilson, 1945)

Hardy native and imported alpines and perennials : retail catalog 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1932)

Hardy New England grown plants, best by test [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Stoughton Nurseries, 1931)

Hardy perennial flower plants, berry plants, grape-vines, hedge plants, climbing vines, vegetable plants : Autumn catalogue, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harry L. Squires, 1929)

Hardy perennial plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Virginia Flower Gardens, 1929)

Hardy perennial plants, season 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1953)

Hardy perennial plants shrubs and vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.T. Lovett, 1909)

Hardy perennial plants shrubs vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.T. Lovett, 1908)

Hardy perennial plants : wholesale trade list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1931)

Hardy perennial plants : wholesale trade list [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1930)

Hardy perennial seeds for September sowing : price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Conyers B. Fleu, Jr, 1924)

Hardy perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Upton Gardens, 1930)

Hardy plant material for 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, 1929)

Hardy plant material for 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, 1930)

Hardy plant material for 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, 1931)

Hardy plant material for 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, 1932)

Hardy plant materials : 1935-1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coryell Nursery, 1935)

Hardy plant materials : fall 1934 prices - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coryell Nursery, 1934)

Hardy plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1932)

Hardy plants : [fall catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1931)

Hardy plants for Canadian homes, 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (McConnell Nursery Co, 1945)

Hardy plants for more profits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Perennial Nurseries, 1932)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1928)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1926)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1921)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1927)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1924)

Hardy plants for the home garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1925)

Hardy plants for the home garden, 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1938)

Hardy plants for the home garden, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1941)

Hardy plants for the home garden, 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W. A. Toole of Garry-Nee-Dule, 1942)

Hardy plants for the home garden : my choicest selections of perennials and other garden plants and seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1923)

Hardy plants for the home garden : Wisconsin wild flowers, perennials and herb plants : fall of 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1941)

Hardy plants, rock plants and annuals : spring 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fisher Flower Farm, 1933)

Hardy plants, rock plants and bulbs : spring 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fisher Flower Farm, 1934)

Hardy plants, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1937)

Hardy plants, wholesale only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1936)

Hardy plants worth having : Spring 1905 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas Meehan & Sons, 1905)

Hardy trees and plants [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. & F. Nurseries, 1915)

Hardy trees and plants [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. & F. Nurseries, 1914)

Hardy trees, evergreens, vines, shrubs, roses, perennials, fruits, etc. : 1923 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Co, 1923)

Hardy trees, shrubs and plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Capital City Nurseries, 1925)

Hardy wildflowers, hardy ferns, perennials, rock-plants, gladiolus bulbs, garden supplies : 1957 spring, fall 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1957)

Hardy wildflowers, hardy ferns, perennials, rock-plants, gladiolus bulbs, garden supplies : 1955 spring, fall 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1955)

Hardy wildflowers, hardy ferns, perennials, rock-plants, gladiolus bulbs, garden supplies : 1956 spring, fall 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1956)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, garden supplies : 1959 spring, fall 1959 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1959)

Hardy wildflowers, hardy ferns, perennials, rock-plants, gladiolus bulbs, garden supplies : 1958 spring, fall 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1958)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, garden supplies : 1951 spring, fall 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1951)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, garden supplies : 1954 spring, fall 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1954)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, garden supplies : 1952 spring, fall 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1952)

Hardy woody plants in the New York Botanical Garden - New York Botanical Garden (New York Botanical Garden, 1920)

Harnden's garden book : 1886-1930, 44th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harnden Seed Co, 1930)

Harnden's garden book, 1933, 46th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harnden's Seed Store, 1933)

Harris 25th annual 1933 garden book and seed catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harris Seed Company, Incorporated, 1933)

Harris garden book and seed catalog : 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harris Seed Co., Inc, 1926)

Harris garden book and seed catalogue : 24th annual, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harris Seed Co., Incorporated, 1932)

Harris garden book, season 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harris Seed Company, 1935)

Hastings' annual price list and catalogue of fresh and reliable garden, field and flower seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings & Co, 1894)

Hastings Seed Company Records - H.G. Hastings; Company (Ga.) (1889)

Hauptkatalog, Nr. 92, 1907 : Wasserpflanzen, Baumschul und Stauden Katalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Heinrich Henkel, 1907)

Have a "Templin-Bradley garden" in 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Templin-Bradley Co, 1934)

Hazel D. Moyle : grower of primroses, fine alpines and rock plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hazel D. Moyle, 1932)

The "Heatherhome" seed and plant book. 1916 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Knight and Struck Company, 1916)

The "Heatherhome" seed and plant book. 1917 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Knight and Struck Company, 1917)

Heathers : yearbook of the Heather Society - Heather Society (The Society, 2005)

Heathers : yearbook of the Heather Society - Heather Society (The Society, 2007)

Hedge Lawn Nurseries [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hedge Lawn Nurseries, 1931)

Hedge Lawn Nurseries, Roanoke, Virginia : [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hedge Lawn Nurseries, 1926)

Hedge Lawn Nursery, Roanoke, Virginia [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hedge Lawn Nursery, 1927)

Hedge Lawn Nursery, Roanoke, Virginia [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hedge Lawn Nursery, 1928)

Hedge Lawn's garden guide [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hedge Lawn Nurseries, 1927)

Helpful planting guide : Autumn 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Arthur J. Collins & Son, 1927)

Henderson's best quality flower bulbs : special prices for those placing orders before July 15th for delivery next fall - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1930)

Henderson's bulb bargains : special low prices for those placing orders before July 15th, 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1934)

Henderson's bulb bargains : special low prices for those placing orders before July 15th, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1931)

Henderson's flower bulbs : special prices for those placing orders before July 15th for delivery next fall - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1929)

Henderson's mid-summer 1930 catalogue : pot-grown strawberry plants perennial flower seeds perennial plants insecticides etc., etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1930)

Henderson's special import offer of best quality flower bulbs : for all orders received up to July 15th, 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1928)

Henderson's wholesale catalogue for florists and market gardeners : autumn 1916, seeds, bulbs, plants, tools, requisites, fertilizers, insecticides, books - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1913)

Henderson's wholesale catalogue for market gardeners and florists - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1914)