- Petter, J J
- Petter, Jean-Jacques 1927-2002
- Petterd, W. F.
- Petterd, W. F.
- Petterd, W. G.
- Petters, S W
- Petters, V
- Petterson, Jim R.
- Petterson, Megan
- Petterson, Merrill
- Pettersson, Eva
- Pettersson, Hans
- Pettersson, Hans, 1888-
- Pettersson, Jan
- Pettersson, Lars
- Pettersson, Otto.
- Pettey, F W
- Petti, Mônica Angélica Varella
- Pettiaux, Pauline
- Pettibone, C. J. V. (Chauncey John Vallette), 1884-1929
- Pettibone, M H
- Pettibone, Marian H.
- Pettigrew, A.
- Pettigrew, James Bell, 1834-1908
- Pettigrew, Mary
- Pettigrew, Robert Leslie, 1893-
- Pettigrew, William
- Pettigrosso, Rosa
- Pettigrosso, Rosa E
- Pettigrosso, Rosa E.
- Pettigrove, Vincent
- Pettinelli, R
- Pettingill, Amos, 1900-1981
- Pettingill, Olin Sewall, Jr. 1907-2001
- Pettis, C. R. (Clifford Robert), 1877-1927
- Pettis, Clifford Robert, 1877-
- Pettis, Clifford Robert, 1877-
- Pettit, A
- Pettit, Anna Stockton, 1865-1899
- Pettit, Auguste
- Pettit, J
- Pettit, James Harvey, 1876-
- Pettit, James Harvey, 1876-1914
- Pettit, Jean
- Pettit, Morley.
- Pettit, N E
- Pettit, Russell Dean.
- Pettit, Ted N
- Pettitt, Charles
- Pettitt, J M
- Pettitt, John Michael
- Pettitt, Karen E.
- Pettovello, Alejandro
- Pettovello, Alejandro D
- Pettry, D K
- Pettry, Daniel K
- Pettus, David
- Petty, Joseph M. A.
- Petty, Alexander
- Petty, J L
- Petty, Jerold L
- Petty, S J
- Petty, S. L.
- Petty, William, Sir, 1623-1687
- Petty-Fitzmaurice, Henry Charles Keith Marquis of, 1845-1927
- Pettyjohn Nursery.
- Petuch, E
- Petuch, E J
- Petuch, Edward
- Petuch, Edward J
- Petunnikov, A. N. 1842-1919
- Petway, Joy R.
- Petzholdt, Georg Paul Alexander, 1810-1889
- Petzler, Anita
- Petzold, Alice
- Petzold, Frank
- Petzold, H-G
- Petzsch, Christoph Heinrich, active 1719-
- Petzsch, Hans
- Petzval, Joseph Maximilian
- Peûa, Jorge E
- Peucer, Kaspar, 1525-1602
- Peuch, F.
- Peulon, V
- Peus, F
- Peusens, Gertie
- Peusquens, Julia
- Pewtress & Co.
- Peyachoknagul, Surin
- Peyer, B
- Peyer, Suzanne M
- Peyerimhoff, Henri de, 1838-1877
- Peyerimhoff, Paul de, 1873-1957
- Peyrard, Nathalie
- Peyre de Fabrègues, B. (Bernard)
- Peyre, Gwendolyn
- Peyrieras, André
- Peyriere, M
- Peyritsch, J
- Peyritsch, J. (Johann), 1835-1889
- Peyritsch, Johann Josef
- Peyrot, A
- Peyrot, A.
- Peyrot, Daniel
- Peyrot-Clausade, Mireille
- Peysson, Augustus.
- Peyssonnel, M. de (Charles), 1727-1790
- Peyton & Barnes.
- Peyton A. Ellison (Firm)
- Peyton Nurseries.
- Peyton, Balie, 1803-1878
- Peyton, David K.
- Peyton, E L
- Peyton, E L
- Peyton, George W.
- Peyton, Jeannie S.,
- Peyton, Jodey
- Peyton, Leonard J.
- Peytoureau, S. Alban.
- Pezalla, Paul D
- Pezenti, Larissa
- Pezenti, Larissa Forim
- Pézier, A
- Pezo, M.
- Pezold, Frank
- Pezza, Leonardo
- Pezzana, Nicolò€, 17th cent-
- Pezzana, Nicolò€, active 1701-1767
- Pezzanite, Barbara (Barbara M.)
- Pezzi, Giovanna
- Pezzi, Luciano
- Pezzi, Marco
- Pezzini, Cleder
- Pezzini, Flavia Fonseca
- Pezzini, Flávia Fonseca
- Pezzino, Elisa
- Pezzo, F
- Pezzolesi, Laura
- Pezzoli, Enrico
- Pezzotta, Marco
- Pezzotti, Mario
- Pezzuti, Juarez
- Pezzuti, Juarez C. B.
- Pezzuti, Tiago L
- Pezzuti, Tiago Leite
- Pezzuto, Paulo Ricardo
- Pfadenhauer, J.
- Pfaender Bros.
- Pfaender, Carl.
- Pfaender, E.
- Pfaender, Emil.
- Pfaender, Max, 1885-
- Pfaender, Max.
- Pfaender, Wm., Jr., 1852-1924
- Pfaender's Seedling Nursery.
- Pfaff, Anne H
- Pfaff, Christoph Heinrich 1773-1852
- Pfaff, Franz
- Pfaff, Friedrich, 1825-1886
- Pfaff, Kurt S.
- Pfaff, Michael
- Pfaffenberger, G S
- Pfaffenberger, Gary S
- Pfaffenzeller, Franz
- Pfalzgraff, Tilo
- Pfander, A. C.
- Pfankuch, K
- Pfankuch, Karl
- Pfannenstiel, Robert Scott
- Pfannenstill, Toralf
- Pfannkuchen, Daniela Maric
- Pfannkuchen, Martin
- Pfannmuller, Kenneth K.
- Pfannmuller, Lee A.
- Pfanzelt, Simon
- Pfarrer, Beat
- Pfau, H K
- Pfau, Ricardo.
- Pfau, Russell
- Pfaundler von Hadermur, Leopold, 1839-1920
- Pfäuti, Patrice
- Pfeffel, Johann Andreas, 1674-1748
- Pfeffer, G. (Georg), 1854-1931
- Pfeffer, Georg Konrad.
- Pfeffer, Jeffrey.
- Pfeffer, Julius
- Pfeffer, P
- Pfeffer, Pierre
- Pfeffer, Pierre 1927-2016
- Pfeffer, W. (Wilhelm), 1845-1920
- Pfefferkorn, Hermann W.
- Pfeifer, E
- Pfeifer, Evelin
- Pfeifer, Howard W
- Pfeifer, Manfred Alban
- Pfeifer, Ray E.
- Pfeifer, Rui Marconi
- Pfeiffer Nursery.
- Pfeiffer, Anthony.
- Pfeiffer, C M
- Pfeiffer, C. A.
- Pfeiffer, Carl (Carl Jonas), 1779-1836
- Pfeiffer, Carroll A
- Pfeiffer, Charles A.
- Pfeiffer, Ernst
- Pfeiffer, H
- Pfeiffer, Hans Heinrich
- Pfeiffer, Henry.
- Pfeiffer, Jeanine
- Pfeiffer, John
- Pfeiffer, John Francis.
- Pfeiffer, Karl E.
- Pfeiffer, L. (Ludwig), 1842-1921
- Pfeiffer, L. E.
- Pfeiffer, Louis (Ludwig Georg Karl), 1805-1877
- Pfeiffer, Louis Ludwig
- Pfeiffer, Norma Etta.
- Pfeiffer, Richard, 1858-1945
- Pfeiffer, Roman A.
- Pfeiffer, Sue A.
- Pfeiffer, Wilhelm, 1867-1959
- Pfeiffer, Wilhelm.
- Pfeiffer, Wolfgang C.
- Pfeiffer, Wolfgang.
- Pfeil, B E
- Pfeil, O E
- Pfeil, Ottomar
- Pfeil, W. (Wilhelm), 1783-1859
- Pfeiler, E
- Pfeiler, Edward J
- Pfennigwerth, P. L.
- Pfenning, Johann Caspar.
- Pfenning, L
- Pfenning, Ludwig
- Pfenninger, Markus
- Pfenninger, Matthias.
- Pfenninger, Roger.
- Pfersdorff, Charles. 1876
- Pfiffner & Marquardt.
- Pfiffner, A
- Pfiffner, Lukas
- Pfingsten, Ian
- Pfingstl, Emmett J.
- Pfingstl, Tobias
- Pfingstl'S Nursery,
- Pfister Corn Company,
- Pfister Hybrid Corn Co. (El Paso, Ill.),
- Pfister Hybrid Corn Company,
- Pfister, Anthony, 1945-
- Pfister, Donald H.