The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1965)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1978)

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

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 newsletter - Denver Botanic Gardens. (Denver Botanic Gardens, 1979)

Greenbrier Farms, inc., Norfolk, Virginia - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Greenbrier Nurseries, 1940)

Greenbrier Farms, inc., Norfolk, Virginia - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Greenbrier Nurseries, 1951)

Greenbrier Nurseries, Norfolk, Virginia - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Greenbrier Nurseries, 1936)

Greenbrier Nurseries, Norfolk, Virginia - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Greenbrier Nurseries, 1939)

Groß-staudenkulturen und handelsgärtnerei: preis-verzeichnis, 1936/37 = Grandes cultures speciales de plantes vivaces de pleine terre: prix-courant, 1936/37 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Frikart, 1936)

Groß-staudenkulturen und handelsgärtnerei: preis-verzeichnis, 1938 = Grandes cultures speciales de plantes vivaces de pleine terre: prix-courant, 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Frikart, 1938)

Ground cover plants : rock-garden plants and herbaceous, perennials, trees, shrubs and evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hugh B. Barclay, 1945)

Gründzuge der Botanik; Repetitorium für Studierende der Naturwissenschaften und Medicin und Lehrbuch für politechnische, land- und forstwirtschaftliche Lehranstalten - Luerssen, Christian, 1843 -1916 (1877)

Grundzüge der Pflanzenverbreitung in den Kaukasusländern von der unteren Wolga über den Manytsch-Scheider bis zur Scheitelfläche Hocharmeniens - Radde, Gustav, 1831 -1903 (W. Engelmann, 1899)

guang zhou zhi wu jian suo biao - Hou, Kuanzhao 侯宽昭 (ke xue chu ban she, 1957)

guang zhou zhi wu zhi - Hou, Kuanzhao 侯宽昭 (ke xue chu ban she)

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

A handbook of systematic botany - Warming, Eugenius, 1841 -1924 (Macmillan & Co, 1895)

A handbook of systematic botany - Warming, Eugenius, 1841 -1924 (Swan, 1904)

Handbook on gardening - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Styer's Nurseries, 1961)

Handbuch der systematischen botanik, mit besonderer berücksichtigung der arzneipflanzen. Bd. 1 - Luerssen, Christian, 1843 -1916 (H. Haessel, 1879)

Handbuch für botanische Bestimmungsübungen - Niedenzu, Franz, 1857 -1937 (Engelmann, 1895)

Handlexikon der Naturwissenschaften und Medizin - Bechhold, H. (Heinrich), 1866 -1937 (Bechhold, 1919)

The Harbinger - Illinois Native Plant Society. (Illinois Native Plant Society, 2016)

The Harbinger - Illinois Native Plant Society. (Illinois Native Plant Society, 2018)

Hard times special bargain offers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.K. Alexander, 1932)

Hardy chrysanthemums : breathtaking new American creation, first offering 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carroll Gardens, 1953)

Hardy Fern Foundation newsletter - Hardy Fern Foundation. (The Foundation, 1994)

Hardy Fern Foundation newsletter - Hardy Fern Foundation. (The Foundation, 1997)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2005)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2009)

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

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2012)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2013)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2014)

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2017)

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

Hardy ferns, wild and rock garden plants, evergreens, hardy plants for better homes and gardens : 1929 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1929)

Hardy ferns, wild and rock garden plants, evergreens, hardy plants for better homes and gardens : 1930 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ferndale Nursery, 1930)

Hardy flowering perennials, roses, shade and flowering trees, shrubs, hedge plants, vines, evergreens, fruit trees, and small fruits : 1928 price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bristol Nurseries, Inc, 1928)

Hardy flowering perennials, roses, shade and flowering trees, shrubs, hedge plants, vines, evergreens, fruit trees, and small fruits : price list, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bristol Nurseries, Inc, 1929)

Hardy flowering perennials, roses, shade and flowering trees, shrubs, hedge plants, vines, evergreens, fruit trees, and small fruits : price list, 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bristol Nurseries, Inc, 1930)

Hardy fruits & ornamentals [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1926)

Hardy garden "mums" : daylilies, Siberian iris : wholesale listing, spring 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Englerth Gardens, 1957)

Hardy garden perennials and rock plants : ornamental shrubs & trees, water lilies : 1930 [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Brown Haven Gardens, 1930)

Hardy herbaceous & Alpine plants : autumn 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1928)

Hardy herbaceous & Alpine plants : fall 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1930)

Hardy herbaceous & Alpine plants : spring 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1928)

Hardy herbaceous & Alpine plants : spring 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1929)

Hardy herbaceous & Alpine plants : wholesale catalog, autumn 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1929)

Hardy herbaceous & Alpine plants : wholesale catalog, autumn 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1928)

Hardy herbaceous & Alpine plants : wholesale catalog, fall 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1930)

Hardy herbaceous & Alpine plants : wholesale catalog, spring 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1930)

Hardy herbaceous & Alpine plants : wholesale catalog, Spring 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1929)

Hardy herbaceous & Alpine plants : wholesale catalog, Spring 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wayside Gardens Co, 1928)

Hardy herbaceous and alpine plants : retail catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch and Son's Hardy Perennial Gardens, 1929)

Hardy herbaceous and alpine plants : retail catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch and Son's Hardy Perennial Gardens, 1928)

Hardy herbaceous and rock garden plants - Clement, G. Latta. (Nik-Nar Farm, 1931)

Hardy herbaceous or perennial plants for gardens, borders, cut flowers and rockeries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ridgeville Nurseries, Inc, 1933)

Hardy herbaceous perennials : price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Prudence Seymour Old-fashioned Garden, 1927)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1931)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1932)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Firm, 1926)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1924)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1929)

Hardy herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1930)

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

Hardy lilies : Oregon grown bulbs, freshly dug for autumn planting : our 25th year, 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Romaine B. Ware, 1955)

Hardy "mums," daylilies, Siberian iris, perinnials : wholesale, spring, 1961 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Englerth Gardens, 1961)

Hardy native and imported alpines and perennials : retail catalog 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1937)

Hardy native and imported alpines and perennials : retail catalog 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1939)

Hardy native and imported alpines and perennials : retail catalog 1934-1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1934)

Hardy native and imported alpines and perennials : retail catalog 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1936)

Hardy native and imported alpines and perennials : retail catalog 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1938)

Hardy native and imported alpines and perennials : retail catalog 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1940)

Hardy native and imported alpines and perennials : retail catalog 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. Borsch & Son, Inc, 1942)

Hardy perennial flowers for 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Stumpp & Walter Co, 1931)

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

Hardy perennial plants : season 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1954)

Hardy perennial plants : season 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1955)

Hardy perennial plants : season 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1956)

Hardy perennial plants : season 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1957)

Hardy perennial plants : season 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1958)

Hardy perennial plants : season 1959 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1959)

Hardy perennial plants : season 1961 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1961)

Hardy perennial plants : season 1962 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (American Perennial Gardens, 1962)

Hardy perennial plants wholesale only for fall 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Company, 1940)

Hardy perennial plants, wholesale only for spring 1943 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph F. Martin Co, 1943)

Hardy perennials grown in severe climate of Northern New York : price list, spring and fall 1943 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Walter C. Stone, 1943)

Hardy perennials, trees, evergreens, shrubs, roses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Upton Gardens, 1944)

Hardy perennials, trees, evergreens, shrubs, roses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Upton Gardens, 1945)

Hardy perennials, trees, evergreens, shrubs, roses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Upton Gardens, 1947)

Hardy perennials, trees, evergreens, shrubs, roses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Upton Gardens, 1936)

Hardy phlox, a specialty - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (August Lindemann, 1949)

Hardy phlox, a specialty - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (August Lindemann, 1948)

Hardy phlox, a specialty - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (August Lindemann, 1943)

Hardy plant and service book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Outdoor Arts Company, Incorporated, 1928)

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 material for 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, 1933)

Hardy plant material for 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1934)

Hardy plant material for 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1936)

Hardy plant material for 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1937)

Hardy plant material for 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1938)

Hardy plant material for 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1941)

Hardy plant material for 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1942)

Hardy plant material for spring of 1943 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1943)

Hardy plant material for spring of 1944 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1944)

Hardy plant material, spring 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1945)

Hardy plant material, spring 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1946)

Hardy plant material, spring 1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Snyder Bros, Inc, 1947)

Hardy plant material spring 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1948)

Hardy plant material spring 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1949)

Hardy plant material : spring 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1950)

Hardy plant material : spring 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1953)

Hardy plant material : spring 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1954)

Hardy plant material : spring 1955 : new roses, lilacs, flowering crabs, shade trees, evergreens, rare shrubs, fruit trees, berries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Linn County Nurseries, 1955)

Hardy plant materials [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.V. Lawrence, 1929)

Hardy plants : a complete collection, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank Josifko, 1929)

Hardy plants and trees for garden and orchard : reference guide and catalog, what and where to plant - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward Lehde Nurseries, 1937)

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 New England gardens, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1937)

Hardy plants for New England gardens, 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1938)

Hardy plants for New England gardens, 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Corliss Bros., Inc., Nurseries, 1939)

Hardy plants for New England gardens, 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Corliss Bros., Inc., Nurseries, 1940)

Hardy plants for New England gardens, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1941)

Hardy plants for New England gardens : perennials, rock plants, flowering shrubs, evergreens, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gray & Cole, 1936)