- Hoopes, Bro. & Thomas.
- Hoopes, Brother & Thomas Company.
- Hoopes, Brother & Thomas.
- Hoopes, Joshua
- Hoopes, Josiah
- Hoopes, Josiah, 1832-1904
- Hoopes, Josiah.
- Hoopes, Keith H
- Hoopes, R L
- Hoopeston Floral Co.
- Hoops, A L
- Hoops, Johannes, 1865-
- Hoops, John Herman Henry, 1859-
- Hoor, E. E.
- Hoorebeke, Luc van
- Hoorn, Berry Van Der
- Hoornbeek, Olive B. Mrs.
- Hoos, Sidney Samuel, 1911-
- Hoosier Aquatic Gardens.
- Hoosier Gardens.
- Hoosier Ranch Nursery.
- Hoot, Sara B
- Hoots, C E
- Hooven, Edward F
- Hoover & Gaines Co.
- Hoover, Caroline
- Hoover, Co.
- Hoover, Craig
- Hoover, Craig M
- Hoover, Edna M.
- Hoover, Gregory A
- Hoover, H.
- Hoover, Herbert, 1874-1964
- Hoover, J P
- Hoover, Jeffrey P
- Hoover, L. G.
- Hoover, Lou Henry, 1874-1944
- Hoover, Max M. (Max Manley), 1895-
- Hoover, P M
- Hoover, Phillip
- Hoover, Robert F
- Hoover, Robert L.
- Hoover, Vicky.
- Hoover, W E
- Hoover, W S
- Hoover, W Scott
- Hoover-Prout co., Avery, O.
- Hooyberghs, Hans
- Hope Dahlia Farm.
- Hope Farm Dahlia Gardens.
- Hope Glad and Floral Garden.
- Hope Nursery (Saltillo, Miss.)
- Hope, C E
- Hope, C. W.
- Hope, Charles Edward, 1864-
- Hope, Clifford E.
- Hope, F
- Hope, F. W. (Frederick William), 1797-1862
- Hope, G S
- Hope, Geoff
- Hope, Geoffrey
- Hope, Geoffrey S
- Hope, I., 19th cent-
- Hope, J H
- Hope, Jean
- Hope, John 1725-1786
- Hope, Katharine
- Hope, Michael
- Hope, R
- Hope, Robert
- Hope, Rory
- Hope, Thomas,
- Hope, W D
- Hope, W D
- Hope, William, Sir.
- Hopedale Nurseries.
- Hopen, H. J. (Herbert John)
- Hopeson, B H
- Hopewell Nurseries (Fredericksburg, Va.)
- Hopewell, Gary P
- Hopewell-Smith, Arthur, 1865-1931
- Hopf, Alice L
- Hopf, Ludwig, 1838-
- Hopf, Sascha
- Hopffer, Carl, 1810-
- Hopffgarten, Max von.
- Hopfinger, Mathias
- Höpfner, Albrecht.
- Høpfner, Johan Jørgen, 1689-1759
- Hopgood, John
- Hopkin, Alderman
- Hopkin, Stephen P
- Hopkins & Wettlin.
- Hopkins Nursery.
- Hopkins Seaside Laboratory.
- Hopkins, A
- Hopkins, A J M
- Hopkins, A. D. (Andrew Delmar), 1857-1948
- Hopkins, A. R. (Aflred R.), 1927-
- Hopkins, Albert, 1807-1872
- Hopkins, Alderman
- Hopkins, Anna J M
- Hopkins, Arthur George, 1869-
- Hopkins, Arthur George, 1869-
- Hopkins, B
- Hopkins, Bjarke
- Hopkins, Caitlyn
- Hopkins, Carl
- Hopkins, Carl D
- Hopkins, Carl S.
- Hopkins, Christine O
- Hopkins, Christopher
- Hopkins, Cyril G. (Cyril George), 1866-1919
- Hopkins, D E
- Hopkins, D L
- Hopkins, David Moody, 1921-2001
- Hopkins, Dwight L
- Hopkins, E R
- Hopkins, E Washburn
- Hopkins, E. F.
- Hopkins, Edwin Fraser, 1891-
- Hopkins, Evan, 1867
- Hopkins, Frank
- Hopkins, Frederick Gowland, Sir, 1861-1947
- Hopkins, G H E
- Hopkins, G S
- Hopkins, G. H. E.
- Hopkins, G. H. E.
- Hopkins, G.H.E.
- Hopkins, Geo. A.
- Hopkins, George A.
- Hopkins, George Henry Evans
- Hopkins, George Henry Evans, 1899-1973
- Hopkins, Gordon J.
- Hopkins, Grant Sherman
- Hopkins, Grant Sherman, 1865-
- Hopkins, Grant Sherman, 1865-
- Hopkins, Heidi
- Hopkins, Helen C Fortune
- Hopkins, Helen C. F.
- Hopkins, I. A.
- Hopkins, Isaac, 1837-1925
- Hopkins, Isaac.
- Hopkins, J. Castell 1864-1923
- Hopkins, J. G
- Hopkins, Jean G
- Hopkins, John William,
- Hopkins, Joseph Gardner, 1882-1951
- Hopkins, K
- Hopkins, Lewis S.
- Hopkins, Liz
- Hopkins, M
- Hopkins, Melanie J.
- Hopkins, Michael
- Hopkins, Michael John Gilbert
- Hopkins, Michael Jonh Gilbert
- Hopkins, Mike
- Hopkins, Milton
- Hopkins, P. W.
- Hopkins, Penny M
- Hopkins, Richard J.,
- Hopkins, Rick B.
- Hopkins, Robert L.
- Hopkins, S. H.
- Hopkins, S. L. Mrs.
- Hopkins, Samuel Herbert, 1884-
- Hopkins, Sewell H
- Hopkins, Sewell Hepburn, 1906-
- Hopkins, T S
- Hopkins, Tapani
- Hopkins, Thomas
- Hopkins, Thomas S
- Hopkins, Timothy.
- Hopkins, William A.
- Hopkins, William E.
- Hopkinson, Alan
- Hopkinson, J
- Hopkinson, John
- Hopkinson, John, 1844-1919
- Hopkinson, Mark
- Hopkins-Stanford Galapagos Expedition, 1898-99.
- Hopkirk, J D
- Hopley, Catherine Cooper.
- Hopley, Judy
- Hopley, Phil
- Hopley, T
- Hopley, Tara
- Hopman, Lisa J.
- Hopp & Lemke (Firm)
- Hopp, H E
- Hopp, Katie
- Hopp, Katie J
- Hopp, Philipp Werner
- Hopp, Richard J.
- Hopp, S L
- Hopp, Walter
- Hoppe, D M
- Hoppe, David Heinrich, 1760-1846
- Hoppe, EGL.
- Hoppe, J
- Hoppe, João Paulo Maires
- Hoppe, John.
- Hoppe, Kurt.
- Hoppe, Peggy
- Hoppe, T
- Hoppe, W J
- Hopper, B
- Hopper, Bruce E.
- Hopper, H P
- Hopper, H Pearson
- Hopper, John N A
- Hopper, Keith
- Hopper, Keith R.
- Hopper, Mariana
- Hopper, Mary Ellen.
- Hopper, R Jackson
- Hopper, S
- Hopper, S D
- Hopper, Stephen
- Hopper, Stephen D
- Hopper, Stephen Donald
- Hopper, Steven
- Hopper, V D
- Hoppe-Seyler, Felix, 1825-1895
- Hoppin, Charles P.
- Hoppin, Gilbert H.
- Hoppin, James M.
- Hoppin, Ruth
- Hopping, Aleita, 1890-
- Hopping, G R
- Hopping, R
- Hopping, W
- Hoppius, C. E.,
- Hoppmann, Anne
- Höppner, Hans
- Hopson, A J
- Hopson, A. J.
- Hopson, A. L.
- Hopson, J
- Hopson, James A.
- Hopson, James Allen.
- Hopson, John
- Hopt, Erwin.
- Hopton, D
- Hopwood, A L
- Hopwood, A Tindell
- Hopwood, A. Tindall
- Hopwood, Arthur Tindell, 1897-1969
- Hopwood, Aubrey, 1863-
- Hopwood, J