- Pierce, Wright M.
- Pierce, Wright M., Mrs.
- Piercey, Rebecca S.
- Piercey-Normore, M D
- Piercey-Normore, Michele D.
- Piercey-Northmore, M. D.
- Piercy, Alma
- Pieri, Fabio Alessandro
- Piéri, J.-B.
- Pieri, M
- Pierini, Brunello
- Pierini, Jorge O
- Pierini, Jorge Omar
- Pierini, Sandra Andréa
- Pieris, P E
- Piermarocchi, Caterina
- Piermarteri, Karina
- Piermattei, Viviana
- Piérola y Flores, Nicolás de, 1788-1857
- Piéron, H
- Piéron, Henri
- Pieroni, Andrea
- Pierotti, Federica
- Pierotti, H
- Pierotti, Heelio
- Pierotti, Helio
- Pierotti, Hello
- Pierotti, Hfelio
- Pierotto, Marcelo Javier
- Pierozan, MK
- Pierozzi, Pedro H. B.
- Pierpont, F. H.,
- Pierrard, G
- Pierrard, Gaston
- Pierrat, Benjamin
- Pierre De La Bathie, H
- Pierre, 19th cent-
- Pierre, C
- Pierre, E.
- Pierre, Éric
- Pierre, J
- Pierre, Jacques
- Pierre, J-F
- Pierre, Joachim Isidore, 1812-1881
- Pierre, Kimberley J. La
- Pierre, Louis 1833-1905
- Pierre, M L
- Pierre, Meshach A.
- Pierre, Victor
- Pierrer, Rémy
- Pierres, Philippe Denys (Parijs)
- Pierres, Philippe-Denis,
- Pierret, Jean
- Pierri, Cataldo
- Piérri, V
- Pierron, Jean Antoine, fl 1780-1812
- Pierron, Sander, 1872-
- Pierrot, Leonardo Monteiro
- Pierrot-Bults, Annelies C.
- Piers, Harry, 1870-1940
- Piersig, Gustav Richard, 1857-1906
- Piersma, T.
- Piersol, George Arthur, 1856-1924
- Piersol, W. H. (William Hunter), 1873-1965
- Pierson, A.N. Inc.
- Pierson, Albert H. (Albert Halsey), 1877-1948
- Pierson, Bernice Frances
- Pierson, Bruce
- Pierson, Clara Dillingham.
- Pierson, D. L.
- Pierson, E. C.
- Pierson, Elizabeth D.
- Pierson, F. R.
- Pierson, F.R. Co.
- Pierson, J M
- Pierson, L
- Pierson, Marissa
- Pierson, R R
- Pierson, Roger
- Pierson, Todd
- Pierson, Todd W
- Pierson, Willard J.
- Piertney, Stuart B
- Piervittori, Rosanna
- Piesch, David, 1802
- Piesman, Joseph
- Pieśnik, Zbigniew
- Piesschaert, Frederic
- Piesse, Alexander C.
- Piesse, Edmund Leolin
- Piesse, Richard
- Piester, Everett A.
- Piestre et Delamollière.
- Pieszczek, Adolf.
- Pieszezek, Geh Hofrat
- Pieszko, Gelina
- Piet, D
- Pieters, A. J. (Adrian John), 1866-1940
- Pieters, P. E.
- Pieterse, Sander
- Pieterse, Sander M
- Pieterse, Welma
- Pietersen, Darren W
- Pietersen, E
- Pietersen, Errol W
- Pieters-Wheeler Seed Company.
- Pieters-Wheeler Seeds (Firm)
- Piętka, Jacek
- Pietkiewicz, M V
- Pietra, F
- Pietrantuono, Ana
- Pietraszewski, Dariusz
- Pietraszko, Monika
- Pietrek, Alejandro G
- Pietrelli, Loris
- Piétrement, Charles Alexandre, 1826-
- Pietri, Ana Paula
- Pietro, da Cortona, 1597-1669
- Pietro, Marc di,
- Pietro, William Di
- Pietrobom, Marcio Roberto
- Pietrobom, Rita de Cássia Violin
- Pietrobon, Anna Julia
- Pietrogiovanna Bronca, José Alfredo
- Pietrokovsky, Silvia M
- Pietropaolo, J. (James)
- Pietropaolo, P.A.. (Patricia Ann)
- Pietrusewsky, M.
- Pietrusewsky, Michael
- Pietruski, Stanisław Konstanty, 1811-1874
- Pietruszka, Robert D
- Pietrykowska-Tudruj, Ewa
- Pietrzak, James E
- Pietsch, Lysle R.
- Pietsch, T J
- Pietsch, T W
- Pietsch, Theodore W
- Pietsch, Werner
- Pietschmann, V
- Pietschmann, Vicktor
- Pietschmann, Victor
- Pietschmann, Viktor
- Piette, Édouard, 1827-1906
- Piette, Geneviève
- Pietz, Pamela J.
- Pievani, Telmo
- Pifano, Daniel Salgado
- Piferrer, Antonio Ortega
- Piffard, Bernadette
- Piffer, Pedro Ribeiro
- Pig, M
- Piga, A
- Piga, Giovanna
- Pigden, Wallace J.,
- Pigeaux, Dr.
- Pigford Nurseries.
- Pigford Nursery.
- Pigg, K B
- Pigg, Kathleen B
- Piggin, C M
- Piggott Nurseries.
- Piggott, A G
- Piggott, Ben
- Piggott, Jeremy
- Piggott, John W.
- Piggott, Maxine P.
- Pigg-Strangeways, Thomas Strangeways.
- Pignal, M
- Pignal, Marc
- Pignal, Marie-Claire
- Pignal, M-C
- Pignani, T. J. (Tullio J.)
- Pignataro, Camillo
- Pignati, Marina T.
- Pigniolo, Andrew
- Pignotti, Lia
- Pigot, Bruce C.
- Pigot, Edward Francis
- Pigott, J P
- Pigott, R
- Pigott, R G
- Pigott, Thomas Digby, 1840-1927
- Pigott, Thomas Digby.
- Pigozzi, G
- Pigozzi, Giorgio
- Pigozzo, Camila
- Pigozzo, Camila Magalhães
- Piguet, Adolphe Pierre David,
- Piguet, E
- Piguet, Emile
- Piha, Markus
- Pihan Delaforest, A. (Ange), 1791-1842
- Pihier, M
- Pihl, Axel, 1838-1927
- Piippo, Sinikka
- Piirainen, Esko
- Piirmann, Timo
- Pijanowski, Bryan
- Pijanowski, Bryan C.
- Pijnappel, J
- Pijper, C
- Pijper, Cornelis
- Pijut, Paula M.
- Pikacha, Patrick
- Pikart, TG.
- Pikart, Tiago
- Pikart, Tiago G.
- Pike & Ellsworth (Firm)
- Pike Brothers.
- Pike County Nurseries.
- Pike, Benjamin, Jr.
- Pike, David T
- Pike, E M
- Pike, Edward M
- Pike, G A
- Pike, Kathleen M
- Pike, Keith
- Pike, Keith S
- Pike, L H
- Pike, Melissa
- Pike, Nicholas, 1817-1905
- Pike, Oliver G. (Oliver Gregory), 1877-1963
- Pike, Radcliffe B.
- Pike, Richard B., 1911-2008
- Pike, S. V.
- Pike, S. W.
- Pike, Walter N. (Walter Nathan), 1862-1953
- Pikes Peak Nurseries,
- Pikes Peak-Colorado Springs Dahlia Gardens,
- Pikes Peak-Colorado Springs Dahlia Gardens.
- Piko, Lajos
- Pil, Maria Whilhelmina
- Pil, Maria Wilhelmina
- Pilařová, Anna
- Pilarski, F.
- Pilarski, Fabiana
- Pilát, Albert.
- Pilat, Ignatz Anton, 1820-1870
- Pilate, G. R.
- Pilate, Vinícius J.
- Pilato, G
- Pilato, Giovanni
- Pilcher, George L
- Pilcher, M
- Pilcher, R E M
- Pildain, María Belén
- Pildain, María Belén
- Pildain, María Belén
- Pile, Adele J
- Pilecco, M