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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- H. Rhodes.
- H.C. Carey & I. Lea (Firm)
- Haak, J.
- Haartman, Joh. Gust.
- Haas, Georg,
- Haas, Meno,
- Hackius, Franciscus,
- Haenke, Thaddäus,
- Haid, Johann Jacob,
- Hales, Stephen,
- Hall, James,
- Haller, Albrecht von,
- Hamilton, Edward,
- Hamilton, Francis,
- Hamilton, William,
- Hammel, Barry Edward,
- Hamsen Schönsperger.
- Hanbury, Daniel,
- Handel-Mazzetti, Heinrich,
- Handsch, Georg H.,
- Hans Schotten.
- Hariot, Paul,
- Harlin, Æstanus Emanuel.
- Hartog, Joannes.
- Harvard University.
- Harvey, William H.
- Hasskarl, J. K.
- Haude und Spener.
- Häussle, J.
- Havell, Robert,
- Haworth, Adrian Hardy,
- Hedrén, Adam,
- Hedrén, Elis,
- Hedwig, Johannes,
- Heinrich Georg Neubauer.
- Helin, Johannes,
- Hellmayr, C. E.
- Hemprich, Friedrich Wilhelm,
- Henderson, I. F.
- Henderson, W. D.
- Henkel, Alice,
- Henry Shaw School of Botany.
- Herlitz, Johannes Nicolaus.
- Hermann Uytwerf.
- Hermann, Paul,
- Herold, Johannes Basilius,
- Herr, Michael,
- Herrera, Cecilia.
- Herzog, Theodor Carl Julius,
- Hier. Frobenium, et Nic. Episcopium.
- Hieronymum Lentz.
- Hieronymus Frobisch.
- Hill, John,
- Hillebrand, W. F.
- Hillebrand, William,
- Hinds, Richard Brinsley,
- Hippocrates
- Hirscht, Karl.
- Hoffmeister, Friderci.
- Hofverberg, Carl Fredrik.
- Höjer, Axel.
- Hojer, L. M.
- Holm, Carl Otto.
- Hombron, Jacques Bernard,
- Hooke, Robert,
- Hooker, Joseph Dalton
- Hooker, Joseph Dalton,
- Hooker, William Jackson,
- Hooper, David,
- Hornstedt, Claës Fredrik,
- Host, Nikolaus Thomas,
- Howe, William,
- Hu, Hsen Hsu,
- Hull, Edward,
- Hultström, Carl Samuel,
- Humbert, H.
- Humboldt, Alexander von
- Humboldt, Alexander von,