1893 · United States Nurseries., Henry G. Gilbert Nursery and Seed Trade Catalog Collection., et al. · Biodiversity Heritage Library (Smithsonian Institution)
1892 · United States Nurseries., Henry G. Gilbert Nursery and Seed Trade Catalog Collection., et al. · Biodiversity Heritage Library (Smithsonian Institution)
1891 · United States Nurseries., Henry G. Gilbert Nursery and Seed Trade Catalog Collection., et al. · Biodiversity Heritage Library (Smithsonian Institution)