- Larter, Edward Nathan
- Larter, Nicholas Christopher, 1961-
- Lartet, Édouard, 1801-1871
- Lartigau, Bernardo
- Lartschneider, Josef
- Larue, Carl D
- Larue, Charles T
- Larue, G.
- Larue, George Roger, 1882-1967
- LaRue, Hubert, 1833-1881
- Larumbe-Morán, Edvino
- Larwood, Gilbert Powell, 1930-1997
- Lary, Christian
- Las Animas Floral Co.
- Las Palmas Greenhouses.
- Las Peñas, Maria Laura
- Las Positas Nursery.
- Las Tunas Cactus Ranch.
- Lasalle, Mark W
- Lasater, J A
- Las-Casas, Flor Maria Guedes
- Lascelles, Arthur Rowley William
- Lascelles, Francis Henry, 1825-1891
- Lascelles, Gerald, 1849-1928
- Lascelles, June, 1924-2004
- Lasch Bulb Farm Inc.
- Lasch Floral Gardens.
- Lascialfari, Stefano
- Lascurain-Rangel, Maite
- Lasègue, Antoine, 1793-1873
- Laseron, Charles Francis, 1887-1959
- Lash, James W, 1929-2000
- Lasher, R
- Lashkari, Mohammadreza
- Lashley, Karl S. (Karl Spencer), 1890-1958
- Lashley, Morgan
- Lashomb, James H
- Lasiak, Theresa
- Laska, Anthony L
- Laska, Matthias
- Laška, Vratislav
- Laskar, Ganga Mohan
- Laskaris, Thomas
- Lasker, Howard R.
- Lasker, Reuben, 1929-1988
- Laskey, Amelia R
- Laskey, W.
- Laskowski, Chester Walter, 1941-
- Laslett, Thomas, 1811-1887
- Lasley, B. J.
- Lasley, Robert
- Lasmar, Cristiane, 1969-
- Lasne, Michel, approximately 1590-1667
- Lasnitzki-Glücksmann, Ilse, 1908-2000
- Laspeyres, Jakob Heinrich, 1768-1809
- Laspeyres, Kurt, 1876-
- Laspoumaderes, Cecilia
- Lassa, María Silvina
- Lassak, Erich V, 1934-2015
- Lassaletta, Luis
- Lassaline, Charlotte R
- Lasseigne, Alex A
- Lassek, Arthur M. (Arthur Marvel), 1902-1995
- Lassell, Caroline.
- Lassell, Jane
- Lassen National Forest (Agency : U.S.)
- Lassen, Christian, 1800-1876
- Lasser, Tobias, 1911-2006
- Lasserre, Pierre, 1940-
- Lassetter, J Stuart
- Lassimonne, Simon-Étienne, 1868-1944
- Lassiter Nursery Co.
- Lasso, Carlos Andrés
- Lasso-Alcalá, Oscar Miguel
- Lassoie, James Philip
- Lassone, Joseph-Marie-François de, 1717-1788
- Lassus, Patrick
- Last, Carel Christiaan Antony, 1808-1876
- Last, Horace R 1996
- Last, Kim S
- Last, Peter Robert
- Lasta, Carlos A
- Låstbom, August Theodor, 1815-1845
- Laster, Stephen
- Lasteyrie du Saillant, Charles-Philibert de, 1759-1849
- Lastimoza, Lucia L
- Laštovička, Josef
- Laštůvka, Aleš
- Laštůvka, Zdeněk
- Lasut, Liana, 1986-
- László, Gyula M., 1970-
- Laszlo, Irinyi
- László, Márk
- László, Zoltán
- Latala, Adam
- Latansio-Aidar, Sabrina Ribeiro
- Latapie, François de Paule, 1739-1823
- Lataste, Fernand, 1847-1934
- LaTaste, Lucian, 1808-1868
- Latcham, Ricardo E. (Ricardo Eduardo), 1869-1943
- Latchford, Benjamin
- Latchford, F. R. (Francis Robert), 1854-1938
- Latchininsky, Alexandre V.
- Latella, Ian M
- Latella, Leonardo
- Later, Jacob de, 1670-1704
- Laterrot, Henri
- Laterveer, Michaël
- Latha, K P Deepna
- Latham, Andrew David MacDuff, 1969-
- Latham, B. M.
- Latham, Charles, 1847-1912
- Latham, Frank Brown, 1910-
- Latham, Harold Strong, 1887-1969
- Latham, John, 1740-1837
- Latham, M. E.
- Latham, Marc, 1940-
- Latham, Peter Wallwork, 1832-1923
- Latham, R. G. (Robert Gordon), 1812-1888
- Latham, Roy A., 1881-1979
- Latham, Vida Annette
- Latham, W. S.
- Latham, Wilfrid
- Lathigara, Rajesh
- Lathrap, Donald Ward, 1927-1990
- Lathrop, Amy
- Lathrop, Earl W., 1924-
- Lathrop, Elbert C. (Elbert Clyde), 1885-1971
- Lathrop, Frank Heidtman, 1891-1982
- Lathrop, Frank Waldo, 1888-
- Lathrop, Leonard E. (Leonard Elijah), 1768-1841
- Lathy, Percy Ireland
- Latif Eugenín, Fadua Leila
- Latif, Baha
- Latiff, Abdul
- Latifi, Mahmoud, 1929-2005
- Latify, Malihe
- Latimer, Bruce Millikin
- Latimer, Carroll
- Latimer, Homer Barker
- Latimer, Louis
- Latini, Anderson Oliveira
- Latini, João Dirço
- Latini, Marta
- Latini, Ricardo Oliveira
- Latino, Maria Teresa
- Latombe, Guillaume
- Latoo, A R
- Latorre Benavente, Juan José, 1846-1912
- Latorre Catalá, Juan Antonio
- Latorre Hidalgo, Claudio
- Latorre, Fabiana
- Latorre, Nicolás
- Latoski, Nicole
- LaTour
- Latour, Paul Bernard, 1951-
- Latourette, Kenneth Scott, 1884-1968
- Latournerie-Moreno, Luis
- Latreille, P. A. (Pierre André), 1762-1833
- Latrobe Valley Field Naturalists Club
- Latrobe, Charles Joseph, 1801-1875
- Latrobe, Christian Ignatius, 1758-1836
- Latrubesse, Edgardo Manuel
- Latsague Vidal, Mirtha Inés
- Latta, George Joseph
- Latta, Randall
- Latta, Robert, 1865-1932
- Latta, Steven C
- Lattanzi, Edda
- Lattar, Elsa Clorinda
- Lattari, Mariano
- Lattaud, Claude
- Latter, Barrie Dale Hingston, 1930-
- Latter, Oswarld Hawkins, 1864-1948
- Latter, Thomas, 1816-1853
- Lattes, Aldo
- Lattig, Patricia
- Lattin, Frank H. (Frank Haak), 1861-1937
- Lattin, John D., 1927-2016
- Lattke, John Edwin
- Lattoo, C S
- Lattuada, Matteo
- Lattuca, María Eugenia
- Latumahina, Fransina S., 1980-
- Latz, Michael I
- Latz, Peter Kenneth
- Latzel, Robert, 1845-1919
- Lau, Alfred Bernhard, 1928-2007
- Lau, Amelia
- Lau, Clive
- Lau, Dieter
- Lau, Henry
- Lau, Kah-Hoo
- Lau, Kar Lun Alan
- Lau, Robert J. (Robert Julius), 1856-1925
- Lau, Sam S S
- Lau, Timothy
- Lau, Wai-Yip
- Lau, Yee Wah
- Laub Drost, Ingrid
- Laubach, René
- Laube, Gustav Carl, 1839-1923
- Laubenfels, David John de, 1925-2016
- Laubengayer, Richard A, 1902-
- Lauber, Alice, 1927-
- Laubert, Charles Jean, 1762-1834
- Laubier, Lucien, 1936-2008
- Laubitz, Diana R
- Laubmann, Alfred Louis, 1886-1965
- Laubscher, Nico
- Lauby, Samantha
- Lauche, Wilhelm, 1827-1883
- Lauchstedt, Heidi
- Lauck, Bonnie
- Lauck, David R
- Laudares-Silva, Roselane
- Laude, G. A., 1860-
- Laudee, Pongsak
- Laudeman, Peter M.
- Laudenslayer, William F.
- Lauder, Alan
- Lauder, George V.
- Lauder, I
- Lauder, Thomas Dick, Sir, 1784-1848
- Laudermilk, Ellis L.
- Laudermilk, Jerome Douglass, 1893-
- Laudicina, Alejandro
- Laudien, Jürgen
- Laudon, Lowell Robert, 1905-1993
- Laudonia, Stefania
- Laue, C.,
- Laue, Emil,
- Laue, Max, 1861-1941
- Lauenroth, William K
- Lauer, David M
- Lauer, Michael J.
- Lauerer, Marianne
- Lauermann, Scott D
- Lauf, Morgan
- Laufa, Raymond
- Laufe, Leonard E
- Laufens, Günter, 1939-
- Laufer, Berthold, 1874-1934
- Laufer, Gabriel
- Laufer, Hans, 1929-
- Laufer, Juliana
- Laufer, Miguel
- Lauff, Randolph
- Lauffer, G
- Lauffer, Max A. (Max Augustus), 1914-