| American Iris Society., Sturtevant, Robert Swan., American Iris Society., & Sturtevant, Robert S. (1920). Bulletin of the American Iris Society (Vol. 105, p. 94). American Iris Society. https://www.biodiversitylibrary.org/page/56174809 |
| Carl Salbach (Firm) & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1944). Iris, narcissus, tulips, vegetable and flower seeds, 1944 (p. 4). Carl Salbach. https://www.biodiversitylibrary.org/page/61075174 |
| Cecil E. Houdyshel (Firm), Houdyshel, Cecil E., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1950). The Iris 400 : a price list of the better iris. Cecil Houdyshel. https://www.biodiversitylibrary.org/page/61681645 |
| Cooley’s Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1942). 1942 Cooley’s Gardens (p. 4). Cooley’s Gardens. https://www.biodiversitylibrary.org/page/43796136 |
| Cottam Iris Garden, Cottam, Audrey B., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1957). 1957 selections from the Cottam Iris Garden. Cottam Iris Garden. https://www.biodiversitylibrary.org/page/62892200 |
| Easy Breeze Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1953). Irises of distinction : 1953 : seventh annual catalog (p. 6). Easy Breeze Gardens. https://www.biodiversitylibrary.org/page/62302616 |
| Elmherst Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1951). Iris, hemerocallis (p. 3). Elmherst Gardens. https://www.biodiversitylibrary.org/page/61760977 |
| Fair Chance Farm. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Iris : buyer’s guide, fall, 1949 (p. 13). Fair Chance Farm. https://www.biodiversitylibrary.org/page/61582845 |
| Fairley’s, Inc., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1952). Change of ownership sale. Fairley’s, Inc. https://www.biodiversitylibrary.org/page/62018015 |
| Fairmount Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1945). Irises, poppies, hemerocallis, hostas, 1945 (p. 5). Fairmount Gardens. https://www.biodiversitylibrary.org/page/61115342 |
| Fleur De Lis Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1944). Iris and hemerocallis, 1944 (p. 3). Fleur De Lis Gardens. https://www.biodiversitylibrary.org/page/61031588 |
| Freudenburg Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1955). 1955 catalog and price list. Freudenburg Iris Garden. https://www.biodiversitylibrary.org/page/62637818 |
| Hill Iris & Peony Farm. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1951). Hill’s irises, peonies and hemerocallis, 1951 (p. 1). Hill Iris & Peony Farm. https://www.biodiversitylibrary.org/page/61785498 |
| Iris City Gardens (Walla Walla, Wash.), Losey, L. B., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Iris City Gardens. Iris City Gardens. https://www.biodiversitylibrary.org/page/61586224 |
| Iris Gulch, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1957). Irises presented for 1957. Iris Test Gardens. https://www.biodiversitylibrary.org/page/62913261 |
| Iris Haven, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1950). 1950 price list. Iris Haven. https://www.biodiversitylibrary.org/page/61681373 |
| Iris Test Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1944). 1944 iris season. Iris Test Gardens. https://www.biodiversitylibrary.org/page/61050553 |
| Kenwood Iris Gardens., Emigholz, J. F., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1950). Kenwood Iris Gardens : summer 1950, spring 1951. Kenwood Iris Gardens. https://www.biodiversitylibrary.org/page/61678267 |
| Kosta Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1951). [Supplement to 1949 catalog]. Kosta Gardens. https://www.biodiversitylibrary.org/page/62039860 |
| Knopf Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1957). Catalogue for 1957 (p. 9). Knopf Iris Gardens. https://www.biodiversitylibrary.org/page/62950258 |
| Lakeside Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). 1949 iris (p. 2). Lakeside Iris Gardens. https://www.biodiversitylibrary.org/page/61586976 |
| LeGron Iris Gardens., Legron, C. H., & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1953). Iris catalogue 1953 (p. 4). LeGron Iris Garden. https://www.biodiversitylibrary.org/page/62380861 |
| Lyon Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1951). Iris and hemerocallis for 1951 : Lyon’s Irisland in the San Fernando Valley (p. 5). Lyon Iris Gardens. https://www.biodiversitylibrary.org/page/62037585 |
| Melrose Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1956). Melrose Gardens 1956(p. 12, 22). Melrose Gardens. https://www.biodiversitylibrary.org/page/62794059. https://www.biodiversitylibrary.org/page/62794069 |
| National Iris Gardens (Beaverton, Or.) & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1943). National Iris Gardens, 1943 (p. 7). National Iris Gardens. https://www.biodiversitylibrary.org/page/60959586 |
| Norwood Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1953). 1953. Norwood Iris Gardens. https://www.biodiversitylibrary.org/page/62390706 |
| Roe Nursery, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1957). Iris, over 1000 varieties, chrysanthemums : 1957, satisfaction guaranteed. Roe Nursery. https://www.biodiversitylibrary.org/page/62953763 |
| Salina Flower Farms, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1951). Iris : buyers guide, fall 1951 (p. 10). Salina Flower Farms. https://www.biodiversitylibrary.org/page/62131589 |
| Schreiner’s Iris Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1943). An iris lover’s catalog, 1943 (p. 4). Schreiner’s Iris Gardens. https://www.biodiversitylibrary.org/page/60973830 |
| Smith’s Gardens (Lewiston, Idaho) & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Smith’s garden book, 1949 spring fall : bearded iris, chrysanthemums, perennials, gladiolus, roses, shrubs(p. 10). Smith’s Gardens. https://www.biodiversitylibrary.org/page/61623129 |
| Syllmar Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1953). Iris and hemerocallis, 1953 (p. 3). Syllmar Gardens. https://www.biodiversitylibrary.org/page/62398113 |
| Tell’s Iris Gardens., Muhlestein, Tell, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Selected iris offerings for 1949 : tall bearded, hybrids (bearded), intermediates, dwarfs, spuria (p. 5). Tell’s Iris Gardens. https://www.biodiversitylibrary.org/page/61621500 |
| Tom Craig (Firm), & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Iris : 1949 hemerocallis, daffodils. Tom Craig. https://www.biodiversitylibrary.org/page/61553771 |
| Warner Iris Gardens, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Iris for your garden : 1949 (p. 3). Warner Iris Gardens. https://www.biodiversitylibrary.org/page/61625218 |
| White’s Iris Garden, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1954). White’s Iris Garden. White’s Iris Garden. https://www.biodiversitylibrary.org/page/62570290 |
| Winne’s Gardens. & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1949). Iris that you’ll want! iris that you’ll grow! iris that will grow for you. … from the Winne “Winning” Gardens, Beatrice, Nebr. Winne’s Gardens. https://www.biodiversitylibrary.org/page/61641428 |