417 titles (books/journals)
1,947 volumes
889,221 pages
173,527 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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- Sahlin, Lars Eric.
- Salberg, Carl Henrik.
- Saldanha da Gama, José de,
- Salisbury, R. A.
- Salmenius, Andreas Gustaf.
- Salvin, Osbert,
- Samuel Harding.
- Samuelem Luchtmans.
- Sandler, Wilhelm.
- Sargent, Charles Sprague,
- Sauerbeck, Friedrich Wilhelm.
- Savatier, Ludovic,
- Schalbaecher, Jos.
- Scheffer, Rudolph H. C. C.
- Scheidl, Franz Anton v,
- Schellenberg, G.
- Scheus, Hermann,
- Schlechtendal, D. F. L. von
- Schliephacke, Karl.
- Schmidt, A.
- Schmidt, Carl Friedrich Wilhelm,
- Schneider, Camillo Karl,
- Schoell, Frédéric,
- Schoell, FreÌdeÌric,
- Schöffer, Peter,
- Schreber, Johann Christian Daniel von.
- Schultes, Joseph August,
- Schultes, Julius Hermann,
- Schumann, Karl Moritz,
- Schur, Philipp Johann Ferdinand,
- Schwacke, Wilhelm,
- Schwägrichen, Christian Friedrich,
- Schwägrichen, Christian Friedrich,
- Seemann, Berthold,
- Segerstadt, Fredrik,
- Seidel, J. E.
- Sellier, François Noël,
- Sen, Binod Lall
- Senefelder, A.
- SesseÌ, Martin,
- Setterblad, Anders Erik,
- Seuter, Bartholomäus,
- Sève, Jacques Eustache de.
- Sibly, E.
- SÌŒternberg, KasÌŒpar,
- Sjöbeck, Carl Fredrik.
- Sloane, Hans,
- Small, John Kunkel,
- Smith, Elisha.
- Smith, James Edward,
- Smith, John Donnell,
- Smithsonian Institution
- SocieÌteÌ botanique de France.
- Societatem typographycam.
- Société botanique de France.
- Society of Gardeners
- Söderberg, Christopher,
- Sörling, Gustaf Erik.
- Someren, Abraham.
- Someren, Joannes van.
- Sonder, Otto Wilhelm,
- Soubeiran, J. Léon
- Southern Methodist University.
- Sowerby, James,
- Sprengel, Anton,
- Sprengel, Kurt Polycarp Joachim,
- Spyck, Johannes van der.
- Stalker C.
- Stanley Smith Horticultural Trust.
- Steudel, Ernst Gottlieb,
- Strauss, Antonii.
- Ström, Gabriel Tobias,
- Struve, Jacob Bernhard,
- Sunberg, Carl Magnus,
- Swartz, Olof,
- Sweet, Robert,
- Syen, Arnold,