423 titles (books/journals)
1,968 volumes
896,248 pages
175,045 links to protologues
Recent additions 
Botanicus is a freely accessible, Web-based encyclopedia of historic botanical literature from the Missouri Botanical Garden
Library. Botanicus is made possible through support from the W.M. Keck Foundation and the Andrew W. Mellon Foundation.
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- Laboratoire de cryptogamie (Muséum national d'histoire naturelle)
- Laboratoire de phaneÌrogamie (MuseÌum national d'histoire naturelle)
- Laet, Joannes de,
- Lamarck, Jean Baptiste Pierre Antoine de Monet de,
- Lambert, Aylmer Bourke,
- Lane-Poole, C. E.
- Lanessan, Jean Marie Antoine de,
- Laroche, François de,
- Laubert, Charles Jean,
- Laurentii Salvii.
- Lauterbach, Karl,
- Le Bouteux, Michel,
- Lehmann, Johann Georg Christian,
- Lemaire, Charles Antoine,
- Leopoldi Joannis Kaliwoda.
- Léveillé, Augustin Abel Hector ; egr.
- Léveillé, H.
- Lexow, Carl Fredrik.
- L'HeÌritier de Brutelle, Charles Louis,
- Librariae Dieterichianae.
- Librarie Gide.
- Lidén, Johan Vilhelm,
- Liedbeck, Pehr Jacob,
- Lindley, John,
- Lindroth, Andreas Bernhard.
- Link, Heinrich Friedrich,
- Linné, Carl von,
- Linnean Society of London.
- Ljungberg, Nils Jonas,
- Lochman, Charles L.
- Lodin, Johan Gustaf.
- Losch, Friedrich.
- Loureiro, João de,
- Lovell Reeve & Co.
- Luchtmans, Samuel.
- Lud. Elzevirium.
- Lundell, Cyrus Longworth,
- Lundmark, Johannes Daniel,
- Lundmark, Peter.