389 titles (books/journals)
3,584 volumes
866,450 pages
168,937 links to protologues
Recent additions 
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Botanicus is made possible through support from the Institute of Museum and Library Services, W.M. Keck Foundation,
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- Abbot, John,
- Acad. M. Swederi.
- Academiae Caesareae Leopoldino-Carolinae.
- Adanson, Michel,
- Aejmelée, Christer,
- Ahlberg, Carl Gustaf.
- Aiton, William,
- Akademie der Wissenschaften in Wien
- Allais, Louis Jean,
- Almeloveen, Theodoor Jansson ab,
- Alpini, Alpino,
- Alpini, Prosper,
- American Academy of Arts and Sciences.
- Amman, Johann,
- Arnam, Steven.
- Arnott, George A. Walker
- Atkinson & Alexander.
- Aublet, FuseÌe,
- Aubriet, Claude,
- Audebert, J. B.
- Aurell, August,
- Axenborg, Pehr.