Authors: F.
- Löwe, F. (Ferdinand) 1809-1889
- Lucas, Frederic A. (Frederic Augustus) 1852-1929
- Lummis, Charles Fletcher 1859-1928
- Lungren, Fernand 1857-1932
- Lutz, Henry F. (Henry Frey) 1868-1926
- Lydon, A. F. (Alexander Francis) 1836-1917
- Lynch, H. F. B. (Harry Finnis Blosse) 1862-1913
- Lyon, F. H. (Francis Hamilton) 1885-
- Lyon, G. F. (George Francis) 1795-1832
- Lyra, F. W. (Friedrich Wilhelm) 1794-1848
- Lys, Francis J. (Francis John) 1863-1947
- MacCarthy, Denis Florence 1817-1882
- MacGrail, Joseph Francis 1873-
- Maclear, G. F. (George Frederick) 1833-1902
- Madden, Frederic 1801-1873
- Magendie, François 1783-1855
- Maire, F. (Frederick) -
- Maitland, Frederic William 1850-1906
- Malherbe, Daniel François 1881-1969
- Mallalieu, Willard F. (Willard Francis) 1828-1911
- Malleson, F. A. (Frederick Amadeus) 1819-1897
- Manderson, Charles F. (Charles Frederick) 1837-1911
- Maning, Frederick Edward 1812-1883
- Mann, Richard F. -
- Mansfield, M. F. (Milburg Francisco) 1871-
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