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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- H.C. Carey & I. Lea (Firm)
- Hackius, Franciscus,
- Haenke, Thaddäus,
- Häussle, J.
- Haid, Johann Jacob,
- Hales, Stephen,
- Hamilton, Francis,
- Hamilton, William,
- Hammel, Barry Edward,
- Handel-Mazzetti, Heinrich,
- Harlin, Æstanus Emanuel.
- Hartog, Joannes.
- Harvey, William H.
- Havell, Robert,
- Haworth, Adrian Hardy,
- Hedrén, Adam,
- Hedrén, Elis,
- Hedwig, Johannes,
- Heinrich Georg Neubauer.
- Helin, Johannes,
- Hellmayr, C. E.
- Henkel, Alice,
- Henry Shaw School of Botany.
- Herlitz, Johannes Nicolaus.
- Hermann Uytwerf.
- Hermann, Paul,
- Herrera, Cecilia.
- Herzog, Theodor Carl Julius,
- Hieronymum Lentz.
- Hill, John,
- Hinds, Richard Brinsley,
- Hoffmeister, Friderci.
- Hofverberg, Carl Fredrik.
- Höjer, Axel.
- Holm, Carl Otto.
- Hooke, Robert,
- Hooker, Joseph Dalton,
- Hooker, William Jackson,
- Hornstedt, Claës Fredrik,
- Host, Nikolaus Thomas,
- Hultström, Carl Samuel,
- Humboldt, Alexander von,