- Proença, Helen C
- Proença, LAO
- Proença, Luis A.
- Proença, Sonia J. R.
- Proença, Suzana Lúcia
- Proescholdt, Beth
- Profant, D
- Profeit, William.
- Profes, Marcos S
- Proffer & Woolfolk Nursery,
- Proffitt, John L.
- Proffitt, Melissa Anderson
- Profice, S R
- Profice, Sheila R
- Profice, Sheila Regina
- Profile Collecting Co.
- Profile Collecting Company.
- Profili, Giuseppe
- Proft, Christian Gottlob (Kopenhagen)
- Proft, Kirstin
- Proft, Kirstin M
- Progar, R A
- Progene, Maria do Perpétuo Socorro
- Program Definition and Cost Facilitator Group.
- Program in the History of the Biological Sciences and Biotechnology.
- Program in the History of the Biosciences and Biotechnology.
- Programa de Investigación Estratégica en Bolivia.
- Progress Nurseries.
- Progress Nursery Co.
- Progress Nursery Company.
- Prohaska, Karl, 1854-1937
- Prohens, J
- Pröhl, Heike
- Proietti Júnior, Aldo Aparecido
- Proietto, Robert L.
- Proix-Noé
- Prokesch von Osten, Anton, Graf, 1795-1876
- Prokhovnik, Simon James
- Prokin, Alexander
- Prokofiev, Artém M
- Prokop, Jakub
- Prokop, Michael E
- Prokopenko, A A
- Prokopenko, Mikhail
- Prokopovich, Dale A
- Prokopy, R J
- Prokopy, Ronald J
- Prokrym, D R
- Proksch, P
- Proksch, Peter
- Proler, Lynette
- Prollius, Friedrich.
- Promaine, Andrew
- ProMax Energy Inc.
- Promis, Alvaro
- Promprom, Wilawan
- Promputtha, Itthayakorn
- Pronek, N
- Proni, Edson Aparecido
- Pronina, Galina P
- Pronk, Cornelis, 1691-1759
- Pronk, G
- Pronos, John, 1944-
- Pronti, Domenico, 1750-
- Pronville, Auguste de.
- Pronzato, R
- Pronzato, R M
- Pronzato, Roberto
- Proo, Sag Del
- Propellers '81 Symposium Virginia Beach, Virginia) 1981-
- Propellers '81 Symposium.
- Property Owners Improvement Co.
- Property Owners' Improvement Co.
- Prophet, C W
- Propp, H
- Prosch, V
- Proschle, Juan
- Proschwitz, Ted von
- Pröse, Herbert K
- Proshchalykin, M. I︠U︡. (Maksim I︠U︡rʹevich)
- Proshek, Benjamin
- Prosi, Rainer
- Proske, U
- Prospect Heights Nursery.
- Prospect Hill Nurseries.
- Prospect Nurseries, Inc.,
- Prospect Plantation Chestnuts,
- Prosperi, C.
- Prósperi, Carlos
- Prosperi, J.
- Prospero, Simone
- Pross Glad Gardens.
- Prosser Nurseries.
- Prosser, C Ladd
- Prosser, C. Ladd (Clifford Ladd), 1907-
- Prosser, Colin D
- Prosser, Thomas, active 1790-
- Prost, Christian Gottlob (Kopenhagen en Leipzig)
- Prost, Théodose Cyriaque
- Prosvirov, Alexander
- Proszynski, J
- Prószyński, Jerzy
- Protázio, Airan
- Protázio, Arielson
- Protectionist
- Protective Nurseries.
- Prothero, B L
- Prothero, Donald R.
- Protheroe, Ernest.
- Protić, Ljiljana
- Protits, Georg
- Prot-Lassale, J
- Proto-Decima, Franca
- Protogino, L C
- Protogino, Lucila
- Protogino, Lucila C
- Protomastro, Jorge J
- Protz, A
- Prötzel, David
- Proud, A
- Proud, D
- Proud, Daniel N
- Proud, Desiree
- Proudfit, S V
- Proudfoot
- Proudfoot, F. G., 1921-
- Proudfoot, G A
- Proudfoot, Glenn A
- Proudfoot, K. G.
- Prouho, M Henri
- Proulx, Benjamin P.
- Proulx, Gilbert, 1954-
- Proulx, Marc
- Proulx, Pauline
- Prous, Marko
- Prous, Xavier
- Prouse, C. Gordon
- Prouse, N. J.
- Proust, Joseph Louis
- Proust, Louis
- Proust, Louis, 1878-1959
- Prout, A E
- Prout, L B
- Prout, L.B
- Prout, Louis B
- Prouty, Edith M.
- Prouty, John J.
- Prouty, Lewis I.
- Prouty, Lorenzo, 1839-1882
- Prouty, R M
- Prouty, Richard M
- Provance, Mitchell
- Provance, Mitchell C
- Provancher, L. (Léon), 1820-1892
- Provasoli, L
- Provasoli, Luigi
- Provencher, J. H.
- Provencher, Jennifer F.
- Provensal, M. Cecilia
- Provensal, María C.
- Provenza, Frederick D.
- Provenzale, Antonello
- Provenzano, Anthony J., Jr.
- Provenzano, Francisco
- Provenzano, Rodolfo Silva
- Provera, A
- Provete, Diogo Borges
- Providence Franklin Society.
- Providence Seed Co.
- Providence Seed Company.
- Provincial Museum of Alberta.
- Provincial Museum of Alberta. Curatorial Section.
- Provincial Museum of Alberta. Natural History Section.
- Provine, John
- Proviz, Valentina
- Provo Nurseries.
- Provonsha, A V
- Provoost, L
- Provoost, Sam
- Provost, A., active 1834-1855
- Provost, A., fl 1834-1855
- Provost, Th. S. (Thomas Stanislas), 1835-1904
- Prowacek, J
- Prowazek, S. von Stanislaus, 1875-1915
- Prowse, G A
- Prowse, Thomas
- Prozorova, Larisa
- Prpic, Nikola-Michael
- Prucha, Martin John, 1874-
- Pruchniewicz, Daniel
- Prudden, H. (Henry),
- Prudden, T. Mitchell (Theophil Mitchell), 1849-1924
- Prudence Seymour Old-fashioned Garden.
- Prudente, Ana Lúcia da Costa
- Prudente, Bruno da Silveira
- Prudente, D. O.
- Prudential Nursery Co.
- Prudential Nursery Company.
- Prudhoe, Stephen
- Prud'homme Van Reine, Willem F
- Prudhomme, Claude.
- Prudic, Kathleen L
- Prueser, Sara V., 1869-
- Pruess, W W
- Pruess, Warren W
- Pruessner, August Henry.
- Pruett-Jones, S
- Pruett-Jones, Stephen
- Pruitt, D. S.
- Pruitt, Jonathan N., 1985-
- Pruitt, William O. Jr. 1922-2009
- Pruitt's Glad Gardens.
- Pruka, Brian
- Prum, Richard O.
- Pruna, Andres.
- Prunella, Paula
- Prunescu, Carol C
- Prunescu, Paula
- Prunet, J
- Prunet, Jacques
- Prünte, W
- Prunty Seed and Grain Co.
- Prusch, Robert D
- Prusiska, Maja
- Pruski, J
- Pruski, J F
- Pruski, John
- Pruski, John F
- Pruski, John Francis
- Prüss, Johann, 1446 or 1447-1510
- Pruss, Shelley
- Prussia (Germany). Finanzministerium.
- Prussia (Germany). K. Preussisches Handels-Ministerium.
- Prussia (Germany). Landtag
- Prussia (Germany). Ministerium für Landwirtschaft, Domänen und Forsten.
- Prussia. Kommission zur Wissenschaftlichen Untersuchung der Deutschen Meere in Kiel.
- Prusty, B C
- Prütz, Gustav.
- Pruvot, G
- Pruvot, Georges, 1852-1924
- Pruvot-Fol, A
- Pruys van der Hoeven, Abraham, 1829-1907
- Prvan, T
- Pryant, Elizabeth B
- Pryce, N W
- Pryce-Tannatt, Thomas Edwin.
- Prychodko, William.
- Pryde, James W
- Pryer, H. (Henry), 1850-1888
- Pryer, Kathleen M. (Kathleen Mary)