Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1973)

Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1974)

Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1985)

Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1991)

Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1995)

Green scene - Pennsylvania Horticultural Society. (Pennsylvania Horticultural Society, 1997)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1958)

The Green thumb - Denver Botanic Gardens. (Colorado Forestry and Horticulture Association, 1962)

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)

The Guide to nature - Agassiz Association. (Agassiz Association, 1908)

A guide to the wild flowers - Britton, Nathaniel Lord, 1859 -1934 (F. A. Stokes, 1899)

A guide to the wild flowers - Rowan, Ellis, 1848 -1922 (McLelland, Goodchild & Steward, 1899)

A guide to the wild flowers - Rowan, Ellis, 1848 -1922 (Stokes, 1899)

A guide to the wild flowers - Rowan, Ellis, 1848 -1922 (W. Briggs, 1899)

The gypsy moth. Porthetria dispar (Linn.). A report of the work of destroying the insect in the commonwealth of Massachusetts, together with an account of its history and habits both in Massachusetts and Europe - Fernald, C. H. (Charles Henry), 1838 -1921 (Wright & Potter Printing Co, 1896)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1895)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1894)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1897)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1898)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1904)

[H. Cannell & Sons materials] - Liberty Hyde Bailey Hortorium. Ethel Z. Bailey Horticultural Catalogue Collection. (H. Cannell & Sons, 1909)

Haliburton flora : an annotated list of the vascular plants of the County of Haliburton, Ontario - Royal Ontario Museum. (Royal Ontario Museum, 1991)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1856)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1874)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1879)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1883)

Hamburger Garten- und Blumenzeitung (R. Kittler, 1889)

Handbook of beautiful flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hoopes, Bro. & Thomas, 1882)

A handbook of greenhouse and bedding plants, embracing descriptions of the most popular plants grown under glass, for various purposes - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cherry Hill Nurseries, 1880)

Handbook of hardy herbaceous and alpine flowers - Sutherland, William. (Blackwood, 1871)

Handbook of the flora of Philadelphia and vicinity, containing data relating to the plants within the following radius: eastern Pennsylvania; all of New Jersey except the northern counties; and New Castle County, Delaware, with keys for identification of species - Brown, Stewardson, 1867 -1921 (Philadelphia Botanical Club, 1905)

Hardy American evergreens - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hardy Evergreen Gardens, 1923)

Hardy American ornamental plants - Gardens of the Blue Ridge (Nursery) (The Gardens, 1920)

Hardy American ornamental plants for immediate effects - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1934)

Hardy American ornamental plants for immediate effects : fall 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1935)

Hardy American ornamental plants for immediate effects : spring 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1936)

Hardy American ornamental plants for immediate effects : spring 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1935)

Hardy American plants : the largest nursery-grown stock of native plants in America - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harlan P. Kelsey, 1898)

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

Hardy Fern Foundation quarterly - Hardy Fern Foundation. (The Hardy Fern Foundation, 2016)

Hardy ferns & flowers, shrubs, roses, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward Gillett, 1901)

Hardy ferns and flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenneth E. Gillett, 1930)

Hardy ferns and flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenneth E. Gillett, 1929)

Hardy ferns and flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenneth E. Gillett, 1932)

Hardy ferns and flowers - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kenneth E. Gillett, 1931)

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, 1898)

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, 1901)

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, and roses : over 60 kinds of lilies, bog plants and orchids in great variety, hardy ornamentals, native shrubs, etc - Gillett, Edward (Firm) (Edward Gillett, 1910)

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, 1912)

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, 1913)

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, 1915)

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, 1920)

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, 1922)

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

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

Hardy ferns and wild flowers : spring and fall 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Johnson's Nurseries, 1952)

Hardy ferns and wild flowers : spring and fall 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Johnson's Nurseries, 1953)

Hardy ferns and wild flowers : spring and fall 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Johnson's Nurseries, 1954)

Hardy ferns and wild flowers : spring and fall 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Johnson's Nurseries, 1955)

Hardy ferns and wild flowers : spring and fall 1955, 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Johnson's Nurseries, 1955)

The hardy flower book - Harvey, Frederick W., (Offices of Country life, ltd. [etc.], 1914)

Hardy herbaceous perennials, alpine and rock plants, hardy florists' flowers, bog and water plants - James Veitch & Sons. (James Veitch & Sons, Ltd, 1913)

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, 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, 1924)

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, 1930)

Hardy herbaceous plants for rock garden and border : price list No. 5, season, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Four O'Clock Garden Nursery, 1931)

Hardy herbaceous, rock garden, native plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nik-Nar Nursery, 1933)

Hardy herbaceous, rock garden, native plants and rare shrubs, 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nik-Nar Nursery, 1934)

Hardy native bulbs, ferns, orchids, wild flowers, and transplanted evergreens and shrubs : trade list, fall 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Co, 1930)

Hardy native ferns, orchids, lilies, trilliums : all for planting in early autumn 1926 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1926)

Hardy native ferns, orchids, lilies, trilliums : all for planting in early autumn, 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1927)

Hardy native lilies, orchids, ferns, aquatic and bog plants, and wild flowers : wholesale trade list, fall 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Isaac Langley Williams, 1935)

Hardy native plants, evergreens and shrubs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Company, 1935)

Hardy native plants, evergreens and shrubs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Company, 1934)

Hardy native plants, evergreens and shrubs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Company, 1932)

Hardy native plants, evergreens and shrubs, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Co, 1932)

Hardy native plants, evergreens and shrubs, 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1939)

Hardy native plants, evergreens and shrubs, 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1940)

Hardy native plants, evergreens and shrubs, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1941)

Hardy native plants, evergreens, trees and shrubs : 1942 wholesale price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1942)

Hardy native plants, evergreens, trees and shrubs : 1945 wholesale price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1945)

Hardy native plants, evergreens, trees and shrubs : 1947 wholesale price-list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1947)

Hardy native plants, evergreens, trees and shrubs : 1948 wholesale price-list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1948)

Hardy native plants, evergreens, trees and shrubs : 1950 wholesale price-list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Charles H. Williams Nurseries, 1950)

Hardy native shrubs and plants from the Gardens of the Blue Ridge - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1934)

Hardy native trees, shrubs and plants [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.E. Williams Nursery Co, 1929)

Hardy plants and bulbs : fall 1948, spring 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1949)

Hardy plants for the home garden, 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.A. Toole, 1937)

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 from a hardy climate : Horsford's autumn supplement for 1903 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fred'k H. Horsford, 1903)

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 and bulbs : all for autumn planting : summer and fall 1950, extended for spring 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1951)

Hardy trees, shrubs, plants and bulbs : all for autumn planting : summer and fall 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1950)

Hardy trees, shrubs, plants and bulbs : all for spring planting : spring 1956 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1956)

Hardy trees, shrubs, plants and bulbs : all for spring planting : spring 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1952)

Hardy trees, shrubs, plants and bulbs : all for spring planting : spring 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1953)

Hardy trees, shrubs, plants and bulbs : fall 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1949)

Hardy trees, shrubs, plants and bulbs : fall-spring 1946-1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1946)

Hardy trees, shrubs, plants and bulbs : fall-spring 1947-1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1947)

Hardy trees, shrubs, plants and bulbs : for fall and spring planting : fall 1953, spring 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1953)

Hardy trees, shrubs, plants and bulbs : for fall and spring planting : fall 1954, spring 1955 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1954)

Hardy trees, shrubs, plants and bulbs : for fall and spring planting 1957-1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1957)

Hardy trees, shrubs, plants and bulbs : for fall and spring planting 1958-1959 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1958)

Hardy trees, shrubs, plants and bulbs : for fall and spring planting 1957 - 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Gardens of the Blue Ridge, 1957)

Hardy trees, shrubs, plants and bulbs : spring 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1949)

Hardy trees, shrubs, vines, roses, plants and their uses : spring 1914 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries Co, 1914)

Hardy vines, climbers, creepers, ferns, aquatic and bog plants, orchids, bulbs and perennials : all for planting in early autumn, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1929)

Hardy vines, climbers, creepers, ferns, aquatic and bog plants, orchids, bulbs and perennials : July and August offerings : all for planting in early autumn, 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1930)

Hardy vines, climbers, creepers, ferns, aquatic and bog plants, orchids, bulbs and perennials : special offerings for July and August : all for planting in early autumn, 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (E.C. Robbins, 1931)

Hardy wild flowers and ferns : catalog for spring and fall - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas M. Wood, 1957)

Hardy wild flowers and ferns : catalog for spring and fall [1958] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas M. Wood, 1958)

Hardy wild flowers, ferns, etc., rock garden, pool plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Andy's Wild Flower Gardens, 1949)

Hardy wild flowers, ferns, etc., rock garden, pool plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Andy's Wild Flower Gardens, 1944)

Hardy wildflowers, ferns, perennials and rock-plants : spring, fall 1944 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hereford's Gardens, 1944)

Hardy wildflowers, ferns, perennials and rock plants : spring, fall, 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1946)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, rose bushes, garden supplies : spring and fall, 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1948)

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, rose bushes, garden supplies : spring and fall, 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1949)

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 : 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 : 1957 spring, fall 1957 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1957)

Hardy wildflowers, hardy ferns, perennials, rock plants, gladiolus bulbs, rose bushes, garden supplies : spring, fall, 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1950)

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 : 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 : 1952 spring, fall 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1952)

Hardy wildflowers, hardy ferns, perennials, rock plants : spring, fall, 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lounsberry Gardens, 1945)

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