776 titles (books/journals)
3,555 volumes
1,518,161 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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- J. Frazer.
- J. G. Cottae.
- J. Taylor.
- J. Wenman.
- Jackson, Benjamin Daydon,
- Jacob de Cordemoy, Eugène,
- Jacobum Mascardum.
- Jacquin, Nikolaus Joseph,
- Jacquinot, Charles Hector,
- Jaeger, August,
- Jäger, Hermann,
- Jan vander Loe.
- Janssonio-Waesbergios.
- Jansson-Waesberg.
- Jaume Saint-Hilaire, Jean Henri,
- Jean Anisson.
- Jean Schott.
- Jeffreys, Thomas.
- Jelliffe, Smith Ely,
- Jessen, Karl Friedrich Wilhelm,
- Jo. Jacobi Palmii.
- Jo. Martyn and Ja. Allestry.
- Joannem Lertotium.
- Joannes Catuffe.
- Joannis König.
- Joh. Rodolphus Genath.
- Johan. Edman.
- Johan. Jacobi Genathii.
- Johann Christian Dieterich.
- Johann David Zunner.
- Johannes le Mair.
- Johannes Thoma.
- Johansson, Johannes
- John and Francis Rivington.
- John Bohn.
- John Nourse.
- Johnson, Thomas,
- Johnston, I. M.
- Jolicoeur, Henri.
- Joncquet, Denis,
- Jones, Marcus E.
- Jos. Kirton.
- Josephi Kurtzböck.
- Josephi Michaelis Gerold.
- Josias Rihel.
- Juan Cromberger.
- Juel, H. O.
- Jung, J. J.
- Jung, Joh. Jacob.
- Junghuhn, Franz Wilhelm,
- Jussieu, Antoine Laurent de,