360 titles (books/journals)
1,842 volumes
846,529 pages
165,978 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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- G.C. Nauck (Firm)
- Garcke, Aug.
- Garnery, Joann. Bapt.
- Gerold, Josephi Michaelis.
- Gibbs, Lilian S.
- Gmelin, Johann Friedrich,
- Godman, Frederick Du Cane,
- Godofredum Kiesewetter.
- Good, Peter P.
- Gorachaud.
- Grandville, J. J.,
- Gray, Asa,
- Grayum, Michael Howard,
- Great Britain.
- Greene, Edward Lee,
- Greville, Robert Kaye,
- Grew, Nehemiah,
- Gribelin, Simon,
- Grisebach, A.
- Gucht, Michael van der,
- Gürke, M.