Handbuch der Blütenbiologie, unter Zugrundelegung von Herman Müllers Werk: "Die Befruchtung der Blumen durch Insekten." - Knuth, Paul, 1854 -1899 (W. Engelmann, 1898)

Handbuch der Botanik - Schenk, A. (August), 1815 -1891 (E. Trewendt, 1879)

Handbuch der Naturbeschreibung zum Schul- und Privatunterrichte - Tetzner, Wilhelm. (Im Verlage der Hahnschen Hofbuchhandlung, 1826)

Handbuch der palaeontologie - Schimper, Wilhelm-Philippe, 1808 -1880 (R. Oldenbourg, 1890)

Handbuch der Pflanzen-Pathologie und Pflanzen-Teratologie - Nees von Esenbeck, C. G. (Christian Gottfried), 1776 -1858 (1841)

Handbuch der Pflanzenkrankheiten - Graebner, Paul, 1871 -1933 (P. Parey, 1928)

Handbuch der Pflanzenkrankheiten - Sorauer, Paul, 1839 -1916 (P. Parey, 1921)

Handbuch der Pflanzenkrankheiten : für Landwirthe, Gärtner und Forstleute - Sorauer, Paul, 1839 -1916 (Wiegandt, Hempel & Parey, 1874)

Handbuch der praktischen Botanik : enthaltend die Geschichte, Beschreibung und Anwendung sämmtlicher in Deutschland wildwachsenden und in den Gärten und Gewächshäusern cultivierten Pflanzen - Voigt, F. S. (Friedrich Siegmund), 1781 -1850 (F. Mauke, 1850)

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)

Handleiding tot de kennis der flora van Nederlandsch Indië : Beschrijving van de families en geslachten der Nederl. Indische phanerogamen - Boerlage, Jacob Gijsbert, 1849 -1900 (E.J. Brill, 1891)

Handwörterbuch der Pharmakognosie des Pflanzenreichs - Wittstein, Georg Christian, 1810 -1887 (E. Trewendt, 1882)

Handwörterbuch der naturwissenschaften - Verworn, Max, 1863 -1921 (G. Fischer, 1912)

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, 1865)

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, 1866)

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, 1869)

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, 1878)

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, 1886)

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, 1889)

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, 1890)

Hardy ferns and flowers, and roses : over 60 kinds of lilies, bog plants and orchids in great variety, hardy ornamentals, native shrubs, etc - Gillett, Edward (Firm) (Edward Gillett, 1890)

Hardy ferns and flowers, and roses : over 60 kinds of lilies, bog plants and orchids in great variety, hardy ornamentals, native shrubs, etc - Gillett, Edward (Firm) (Edward Gillett, 1903)

Hardy ferns and flowers, and roses : over 60 kinds of lilies, bog plants and orchids in great variety, hardy ornamentals, native shrubs, etc - Gillett, Edward (Firm) (Edward Gillett, 1904)

Hardy ferns and flowers, and roses : over 60 kinds of lilies, bog plants and orchids in great variety, hardy ornamentals, native shrubs, etc - Gillett, Edward (Firm) (Edward Gillett, 1908)

Hardy ferns and flowers, shrubs, roses, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward Gillett, 1898)

Hardy ferns and flowers, shrubs, roses, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward Gillett, 1897)

Hardy ferns and flowers : Southwick Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward Gillett, 1904)

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

Hardy garden favorites [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Van Laar & Company, 1927)

Hardy garden favorites [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Van Laar & Company, 1926)

Hardy garden flowers - Biltmore Nursery (Biltmore, N.C.) (Biltmore Nursery, 1912)

Hardy garden flowers - Biltmore Nursery (Biltmore, N.C.) (Biltmore Nursery, 1910)

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

Hardy herbaceous perennials : wholesale list fall 1915 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W. & T. Smith Co, 1915)

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, 1929)

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, 1932)

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, 1930)

Hardy herbaceous plants and ornamental grasses - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink and Atkins, 1903)

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

Hardy ornamentals : trees, plants bulbs ferns shrubs, vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1899)

Hardy perennial flower seeds : including new varieties besides old-fashioned flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Palisades Nurseries, Incorporated, 1921)

Hardy perennial plants from all over the world Fall 1919 spring 1920 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1919)

Hardy perennials and old-fashioned garden flowers. Describing the most desirable plants for borders, rockcries, and shrubberies, and including both foliage and flowering plants - Wood, John, of Woodville, Eng. (L.U. Gill, 1884)

Hardy perennials and rock plants : wholesale list of inspected stock, season of 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (George Frank & Son, 1936)

Hardy perennials and rock plants : wholesale list of inspected stock, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (George Frank & Son, 1932)

Hardy perennials and rock plants : wholesale list of inspected stock, 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (George Frank & Son, 1934)

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

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

Hardy plants : a complete collection : 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank Josifko, 1926)

Hardy plants : a complete collection : 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank Josifko, 1927)

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

Hardy plants for cottage gardens - Albee, Helen Rickey, 1864 -1939 (H. Holt and company, 1910)

Hardy plants of rare quality : Fall 1903 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas Meehan & Sons, 1903)

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

Hardy trees and shrubs, greenhouse plants, orchids - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Co, 1915)

Hardy trees and shrubs, greenhouse plants, orchids [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1914)

Hardy trees, shrubs and plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1910)

Hardy trees, shrubs and plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Company, 1919)

Hardy trees, shrubs, plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Louis A. Byrne Nurseries, Inc, 1936)

Hardy trees, shrubs, plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Daybreak Nurseries, 1936)

Hardy trees shrubs, vines, evergreens, hardy perennials and fruits : Spring 1903 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas Meehan & Sons, 1903)

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

Harris' seeds, 1933 : wholesale price list for market gardeners and florists - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Joseph Harris Company, Inc, 1933)

Harrisons Leicester garden seeds, sundries 1919 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harrison & Sons], 1919)

Harrold's pansy annual, 1937 season, June 1, 1937 to June 1, 1938 : offering Harrold's pedigreed strain giant pansies and other seed and bulb specialties : wholesale prices for the professional florist and nurseryman - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harrold's Pansy Gardens and Greenhouses, 1937)

Harvey's seed annual, 1858-1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harvey Seed Company, Inc, 1937)

Hastings' nursery annual : winter 1932-1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1932)

Hastings' nursery annual : winter 1933-1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1933)

Hastings Seed Company Records - H.G. Hastings; Company (Ga.) (1923)

Hastings Seed Company Records - H.G. Hastings; Company (Ga.) (1932)

Hastings' seeds : fall 1913 catalogue no. 46 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1915)

Hastings' Seeds : fall 1928 76th catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1929)

Hastings' Seeds : fall 1928 76th catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1930)

Hastings' seeds : [fall 1933] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1933)

Hastings' seeds : spring 1933 85th catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1932)

Hastings' seeds : spring 1933 85th catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.G. Hastings Co, 1933)

Hauptpreisverzeichnis, 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Pabst, 1928)

Hauptpreisverzeichnis, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Pabst, 1929)

Hauptverzeichnis über Samen und Pflanzen - Haage & Schmidt. (Haage & Schmidt, 1915)

Hauptverzeichnis über Samen und Pflanzen - Haage & Schmidt. (Haage & Schmidt, 1921)

Die Heimat - Verein Zur Pflege Der Natur- Und Landeskunde In Nordelbingen (Husum Druck- und Verlagsgesellschaft, 1894)

Die Heimat - Verein Zur Pflege Der Natur- Und Landeskunde In Nordelbingen (Husum Druck- und Verlagsgesellschaft, 1891)

Heinrich Gottfried, Grafens von Mattuschka ... Flora Silesiaca, oder, Verzeichniss der in Schlesien wildwachsenden Pflanzen : nebst einer umständlichen Beschreibung derselben, ihres Nutzens und Gebrauches so wohl in Absicht auf die Arzney- als Haushaltungs-Wissenschaft - Mattuschka, Heinrich Gottfried, Graf von, 1734 -1779 (W.G. Korn, 1776)

Helios - Huth, Ernst, 1845 -1897 (R. Friedländer & Sohn, 1895)

Hello neighbor - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Washington Seed Co, 1955)

Henderson's autumn catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1911)

Henderson's autumn catalogue : 1908 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1907)

Henderson's autumn catalogue : 1908 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1908)

Henderson's autumn catalogue : 1908 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1909)

Henderson's autumn catalogue : 1910 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Peter Henderson & Co, 1910)

Henderson's Handbook of plants and general horticulture - Henderson, Peter, 1822 -1890 (P. Henderson & Co, 1890)

Henderson's Handbook of plants and general horticulture - Henderson, Peter, 1822 -1890 (P. Henderson & Co, 1910)

Henderson's Handbook of plants and general horticulture - Henderson, Peter, 1822 -1890 (P. Henderson & company, 1910)

Henderson's Handbook of plants - Henderson, Peter, 1822 -1890 (P. Henderson & Co, 1881)

Henrici Godefridi, Comitis de Mattuschka ... Enumeratio stirpium in Silesia sponte crescentium - Mattuschka, Heinrich Gottfried, Graf von, 1734 -1779 (Sumptibus G. T. Kornii, 1779)

Herbaceous perennials, rock plants, and hardy vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Muller-Sealey Co., Inc, 1927)

The herball, or, Generall historie of plantes - Dodoens, Rembert, 1517 -1585 (By [Edm. Bollifant for Bonham Norton and] Iohn Norton, 1597)