781 titles (books/journals)
3,528 volumes
1,520,256 pages
207,548 links to protologues
Recent additions 
Botanicus is a freely accessible portal to historic botanical literature from the Missouri Botanical Garden Library.
Botanicus is made possible through support from the Institute of Museum and Library Services, W.M. Keck Foundation,
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- Sagra, Ramón de la,
- Sahlin, Lars Eric.
- Saillant.
- Salberg, Carl Henrik.
- Saldanha da Gama, José de,
- Salisbury, R. A.
- Salmenius, Andreas Gustaf.
- Salmon, William,
- Salvin, Osbert,
- Samuel Harding.
- Samuelem Luchtmans.
- San Diego Society of Natural History.
- Sander, F.
- 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,
- Scheutz, Nicolaus Johannes
- Schimper, Wilhelm-Philippe,
- Schlechtendal, D. F. L. von
- Schliephacke, Karl.
- Schmidt, A.
- Schmidt, Carl Friedrich Wilhelm,
- Schneider, Camillo Karl,
- Schoell, Frédéric,
- Schöffer, Peter,
- Schöpf, Johann David,
- Schott, Arthur,
- Schott, H. W.
- Schrader, Heinrich Adolph,
- Schreber, Johann Christian Daniel von.
- Schultes, Joseph August,
- Schultes, Julius Hermann,
- Schumann, Karl Moritz,
- Schur, Philipp Johann Ferdinand,
- Schwacke, Wilhelm,
- Schwägrichen, Christian Friedrich,
- Scopoli, Giovanni Antonio,
- Scot, Michael,
- Seba, Albert,
- Sebastianum Henricpetri.
- Seemann, Berthold,
- Segerstadt, Fredrik,
- Seidel, J. E.
- Sellier, François Noël,
- Sen, Binod Lall
- Senefelder, A.
- Serapion,
- Serval, Gustave.
- Sessé, Martin,
- Setterblad, Anders Erik,
- Seuter, Bartholomäus,
- Sève, Jacques Eustache de.
- Shaw, Henry,
- Sheridan, Philip Henry,
- Shinners, Lloyd Herbert,
- Sibly, E.
- Siebold, Philipp Franz von,
- Sjöbeck, Carl Fredrik.
- Sloane, Hans,
- Small, John Kunkel,
- Smith, Daniel
- Smith, Elisha.
- Smith, James Edward,
- Smith, John Donnell,
- Smith, John,
- Smithsonian Institution
- Snow, Neil
- Societas pro Fauna et Flora Fennica.
- Societatem typographycam.
- Société botanique de France.
- Société des sciences naturelles de Cherbourg.
- Société linnéenne de Paris.
- Société pour l'Echange des Plantes a Budapest, Hongrie.
- Society of Gardeners
- Söderberg, Christopher,
- Solander, Daniel Charles,
- Someren, Abraham.
- Someren, Joannes van.
- Sonder, Otto Wilhelm,
- Sörling, Gustaf Erik.
- Soubeiran, J. Léon
- Southern Methodist University.
- Sowerby, Jac.
- Sowerby, James,
- Spaulding, Perley.
- Spencer, J. W.
- Spix, Johann Baptist von,
- Spratt, G.
- Sprengel, Anton,
- Sprengel, Christian Konrad,
- Sprengel, Kurt Polycarp Joachim,
- Spring, Anton Friedrich,
- Spyck, Johannes van der.
- Stalker C.
- Stanley Smith Horticultural Trust.
- Steudel, Ernst Gottlieb,
- Strauss, Antonii.
- Streater, John
- Ström, Gabriel Tobias,
- Struve, Jacob Bernhard,
- Stünzner, Kurt.
- Sturm, Jakob,
- Sullivant, William Starling,
- Sunberg, Carl Magnus,
- Süssenguth, Karl,
- Swartz, Olof,
- Sweet, Robert,
- Syen, Arnold,