781 titles (books/journals)
3,561 volumes
1,520,256 pages
207,548 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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- E. Allde.
- E. Morford, Willington & Co.
- East India Company.
- Eaton, Daniel Cady,
- Ecklon, Christian Friedrich,
- Ederschen, Joseph.
- Edgren, Peter Adolf,
- Edman, Joh.
- Edwards, George,
- Edwards, Sydenham,
- Edwards, William H. Cambden,
- Ehrenberg, Christian Gottfried,
- Ehret, Georg Dionysius,
- Eichler, August Wilhelm,
- Eisenberger, Nicolaus Friedrich,
- Ekermark, Isaac Vilhelm.
- Ekman, Olof Jacob,
- Elliott, Stephen,
- Ellis, David,
- Elmsly, P.
- Elwes, Henry John,
- Emmons, Samuel Bulfinch.
- Emory, William H.
- Endlicher, István László,
- Endlicher, Stephan,
- Engelmann, George,
- Engholm, Jonas Joh.
- Englemann, George,
- Engler, Adolf,
- Epling, Carl,
- Ernest Panckoucke.
- Erxleben, Johann Christian Polycarp,
- Ewan, Joseph Andorfer,
- Ewan, Nesta.