• Lamasia Moore, 1898 (uncertain)
• Lambaesia Rebel, 1903
• Leasia Jacoby, 1907
• Lebisia Breuning, 1958
• Lecasia Fawcett, 1916 (uncertain)
• Lemania Bory in C.A. Agardh, 1824 accepted as Lemanea Bory de Saint-Vincent, 1808 [Family: Batrachospermaceae]
• Lemania Forel, 1878 accepted as Hygrobates Koch in Panzer, 1837 [Family: Hygrobatidae]
• Lemaria Medler, 1988 (uncertain)
• Lembonia Bernhauer, 1932
• Lembosia J.H. Léveillé, 1845
• Lembosina Theissen, 1913
• Lemnalia Gray, 1868
• Lemosia Pessôa & Ayrosa Galvão, 1936
• Leucasia Rafinesque, 1837 (uncertain)
• Lybasia Delkeskamp, 1965 (uncertain)