- Plantade, François de, 1670-1741
- Plantation Gardens (Firm),
- Plante, Émile.
- Plante, J
- Plante, J. B.
- Plante, Raphaël
- Plantentuin Meise
- Planters' Nurseries
- Planters' Nurseries.
- Planters Nursery Co. (Winfield, Kan.)
- Planters Nursery Company.
- Planters Seed Co. (Shreveport, La.)
- Planters Seed Co. (Springfield, Mo)
- Planters Seed Company.
- Planthon, M J-E
- Plantijnsche Drukkerij
- Plantin, Christophe, approximately 1520-1589
- Plantin, Martina 1550-1616
- Plantiniana (Ex Officina)
- Plantiniana, officina (Leiden)
- Planz, John V.
- Plascencia González, Héctor G.
- Plascencia-González A.
- Plascencia-González, Héctor G.
- Plasek, Vitezslav
- Plasencia, Edelquis
- Plaskett, J. S.
- Plassan, Joseph-Raymond,
- Plassan, Pierre, 1751?-1810
- Plasse, C.
- Plasse, Chelle
- Plassmann, E
- Plassmann, Eberhard
- Plastino, Estela M.
- Plastino, Estela Maria
- Plata Gómez, A.
- Plata, Eimy Rivas
- Platania, Leonardo
- Platania, S P
- Plataniotis, Konstantinos N.
- Plata-Rosas, Luis J
- Plata-Rosas, Luis Javier
- Platas, G
- Platas, Javier González
- Plate, Ludwig, 1862-1937
- Plateau, F
- Plateau, Félix Auguste Joseph, 1841-1911
- Plateau, M F
- Platel, Roland
- Platel, T G H
- Platell, M E
- Platen, Paul Louis, 1876-
- Platen, R
- Platen, Ralph
- Plath, H.
- Plath, Karl
- Plath, O E
- Plath, O. E. (Otto Emil), 1885-1940
- PLATHONG, JINTANA
- Plathong, Sakanan
- Platia, G
- Platia, Giuseppe
- Platner, G. R. (Gary R.)
- Platnick, Norman I.
- Platonova, T. A.
- Platt & Barnes (Firm)
- Platt, A P
- Platt, Arnold William,
- Platt, Austin P
- Platt, Burton Coles
- Platt, C
- Platt, Charles A. (Charles Adams), 1861-1933
- Platt, Corry T
- Platt, Frank L., 1888-
- Platt, Frank S.
- Platt, Franklin
- Platt, H M
- Platt, Howard M
- Platt, J B
- Platt, Jerry L
- Platt, Roy N
- Platt, Roy N., II,
- Platt, Rutherford
- Platt, S
- Platt, S G
- Platt, S W
- Platt, Steven G
- Platt, Thomas R
- Platt, Thomas Reid.
- Platt, Thomas.
- Platt, Trevor
- Platten, John.
- Platter, Franz, 1645-1711
- Plattes, Gabriel, fl 1638-1640
- Plattner, Hans
- Platts, J
- Platts, John, 1775-1837
- Platts, William S., 1928-
- Platvoet, D
- Platz, Bruce William.
- Platzer, Gregory P.
- Platzmann, Albert.
- Platzmann, Julius, 1832-1902
- Plaumann, Fritz
- Plaumann, Fritz.
- Plaut, I
- Plaut, Max
- Plavan, A. Acuña
- Player, Ann
- Player, Anne
- Player, Rodney L
- Playfair, Ernest, 1871-
- Playfair, G I
- Playfair, John, 1748-1819
- Playfair, Lyon Playfair, Baron, 1818-1898
- Playfair, R L
- Playfair, R. Lambert Sir, (Robert Lambert), 1828-1899
- Playford, G
- Playford, Geoffrey
- Playford, Julia
- Playford, P E
- Playford, Phillip
- Playford, Phillip E
- Plaza Benito, Antonio
- Plaza Seed Store.
- Plaza, E
- Plaza, Guido
- Plaza, Hugo Lea
- Plaza, J
- Plaza, Tarik G. D.
- Pleas, E
- Pleasant Hill Nursery (Earlville, Iowa)
- Pleasant Hill Nursery Co.
- Pleasant Ridge Nurseries.
- Pleasant Run Nurseries.
- Pleasant Valley Farm.
- Pleasant Valley Farms,
- Pleasant Valley Nurseries and Seed Farms.
- Pleasant Valley Nurseries.
- Pleasant Valley Nursery (McMinnville, Tenn.)
- Pleasant Valley Seed Corn Farm.
- Pleasant View Farm.
- Pleasant View Gardens.
- Pleasant View Nurseries.
- Pleasant View Nursery
- Pleasants, Barbara Yohai
- Pleasants, J. Hall, jr.
- Plećaš, Milan
- Pledge, N S
- Pledge, Neville S
- Pledge, Neville S.
- Pledger, Shirley
- Plée
- Plée, François,
- Plée, Victoire,
- Pleguezuelos, Juan M
- Plehn, Marianne, 1863-1946
- Pleijel, Fredrik
- Pleines, Thekla
- Plenck, Joseph Jacob, Ritter von, 1738-1807
- Plenge, M A
- Plenicar, Mario
- Plenković-Moraj, Anđelka
- Plentovich, Sheldon
- Plesa, C
- Pleše, Bruna
- Plese, Tinka
- Pleske, F. D. (Feodor Dmitrievich), 1858-1932
- Pless, Adelheid, Fürstin von.
- Pless, J
- Pless, RC
- Plessers, A. G.
- Plesset, Milton S.
- Plessis, Andre Du
- Plessis, Du
- Plessis, G J Du
- Plessis, Jacqueline
- Plessis, Judy Du
- Plessis, L.A.
- Plessis, Y
- Plessis, Yves
- Plessis, Yves B
- Plesters, R J
- Pletcher, Leeanna T
- Pletcher'S Wholesale Nursery,
- Pletscher, Daniel H.
- Plewa, Radosław
- Pleyer, Gerhard
- Plice, M J
- Pliego, Polinka Hernandez
- Pliego-Cárdenas, Ricardo
- Pliego-Cortés, Hugo Skyol
- Plimer, Ian
- Plimmer, H. G. (Henry George), 1856-1918
- Plimmer, Robert Henry Aders, 1877-1955
- Plimpton, Frederic S.
- Plimpton, George Arthur
- Plimpton, Oakes.
- Plint, A. Guy.
- Pliny, the Elder, 23 or 24-79
- Pliny, the Elder.
- Pliny, the Younger.
- Plischuk, Santiago
- Pliscoff, Patricio
- Plisetskaya, Erika M
- Plissner, Jonathan H
- Pliszko, Artur
- Plitmann, Uzi
- Plitt, Charles C
- Plitt, Charles C., 1869-1933
- Plitt, Charles Christian
- Plitz, F M
- Pliven, Charles F.
- Pljushch, Igor G
- Pljushtch, I G
- Plocher, Allen E.
- Płóciennik, Mateusz
- Plodowski, Tomasz,
- Ploetz, Adolf.
- Plog, Fred,
- Plomley, N J B
- Plomp, Wouter
- Plön (Germany). Biologische Station.
- Plon, Henri,
- Plos, Anabela
- Ploschuk, Edmundo Leonardo
- Ploszak, Steven
- Plot, Robert, 1640-1696
- Plotkin, Mark J.
- Plôtner, Jôrg
- Plotnick, Roy E.
- Plotnik, Rodney Joseph, 1939-
- Plötz, C
- Plötz, Carl
- Plough, Harold H
- Plourd, Kenneth C
- Plourde, Anna
- Plouvier, Edouard, 1821-1876
- Plouvier, V
- Plouvier, Victor
- Plowden, R C
- Plower, W H
- Plowes, Robert
- Plowman, Amon B
- Plowman, Amy
- Plowman, Kristine P
- Plowman, R A
- Plowman, T
- Plowman, Thomas F. (Thomas Forder), 1844-1919
- Plowman, Timothy Charles