[Harlan P. Kelsey (Firm) materials] - Harlan P. Kelsey (Firm) (1885)

Harper's guide to wild flowers - Creevey, Caroline A. Stickney, 1843 -1920 (Harper, 1912)

Headquarters for Christmas greens : season 1923-1924 [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1923)

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)

The Henry Philipps Seed & Implement Co. : growers, importers, wholesale and retail dealers in flower, field and garden seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1905)

The Henry Philipps Seed & Implement Co. : growers, importers, wholesale & retail dealers in garden, field & flower seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1903)

The Henry Philipps Seed & Implement Co. : growers, importers, wholesale and retail dealers in flower, field and garden seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1904)

The Henry Philipps Seed and Implement Co. : growers, importers, wholesale & retail dealers in garden, field & flower seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1902)

The Henry Philipps Seed and Implement Co. : growers importers wholesale & retail dealers in garden field & flower seeds 1911 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1911)

The Henry Philipps Seed and Implement Co., importers and growers of garden, field and flower seeds, bulbs and plants : 1910 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1910)

The Henry Philipps Seed and Implement Co., importers and growers of garden, field and flower seeds, bulbs and plants : 1908 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Philipps Seed and Implement Co, 1908)

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

Herbaceous perennials, rock plants, and hardy vines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Muller-Sealey Co., Inc, 1930)

The herball, or, Generall historie of plantes - Dodoens, Rembert, 1517 -1585 (Printed by Adam Islip Joice Norton and Richard Whitakers, 1633)

The Herball, or, Generall historie of plantes - Dodoens, Rembert, 1517 -1585 (By Iohn Norton, 1597)

Das Herbarienbuch : Erklärung des natürlichen Pflanzensystems, systematische Aufzählung, Synonymik und Register der bis jetzt bekannten Pflanzengattungen ... = Repertorium herbarii, sive, Nomenclator generum plantarum systematicus synonymicus et alphabeticus ad usum practicum accommodatus ... - Reichenbach, H. G. Ludwig (Heinrich Gottlieb Ludwig), 1793 -1879 (In der Arnoldischen Buchh, 1841)

Histoire des plantes - Baillon, H. (Henri), 1827 -1895 (Librairie Hachette, 1892)

Histoire naturelle de Buffon, clasée par ordres, genres et espèces, d'après le système de Linné, avec les caractères génériques et la nomenclature Linnéenne - Buffon, Georges Louis Leclerc, comte de, 1707 -1788 (Chez Deterville, 1803)

Histoire naturelle des végétaux. Phanérogames, Phanérogames - Spach, Edouard, 1801 -1879 (Librairie encyclopédique de Roret, 1840)

Histoire naturelle des végétaux. Phanérogames, Phanérogames - Spach, Edouard, 1801 -1879 (Librairie encyclopédique de Roret, 1848)

Historia natural : la creación - Brehm, Alfred Edmund, 1829 -1884 (Montaner y Simón, 1880)

History of Shortia School - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Shortia School, 1895)

Horseshoe bulbology - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ralph M. Ward & Co, 1913)

Horsford's autumn supplement : cold weather plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1916)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1904)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1901)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1909)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1913)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1915)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1906)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1916)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1907)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1917)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1908)

Horsford's Nurseries - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1912)

Horsford's trade list of bulbs, ferns, orchids, and bog plants for the summer and autumn of '93 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F.H. Horsford, 1893)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1904)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1905)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1906)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1921)