389 titles (books/journals)
3,584 volumes
866,450 pages
168,937 links to protologues
Recent additions 
Botanicus is a freely accessible portal to historic botanical literature from the Missouri Botanical Garden Library.
Botanicus is made possible through support from the Institute of Museum and Library Services, W.M. Keck Foundation,
and the Andrew W. Mellon Foundation. Learn more...
- Raban,
- Raffeneau-Delile, Alire,
- Rafinesque, C. S.
- Redouté, Henri Joseph.
- Redouté, Pierre Joseph,
- RedouteÌ, Henri-Joseph,
- RedouteÌ, Pierre Joseph,
- Reede tot Drakestein, Hendrik van,
- Reiche, Karl Friedrich,
- Reichenbach, H. G.
- Reid, Hugo.
- ReÌmond, N.
- Renauld, F.
- Ridgway, James
- Ridgways.
- Ridinger, Johann Elias,
- Rijksherbarium (Netherlands)
- Robinson, Benjamin Lincoln,
- Rodrigues, J. Barbosa
- Römer, J. J.
- Römer, J. J.
- Rousseau, Jean-Jacques,
- Rowley, Gordon D.
- Roxburgh, William,
- Royal Botanic Gardens, Kew.
- Royen, Adrianus van,
- Royle, J. Forbes
- Ruiz, Hipólito,
- Rumpf, Georg Eberhard,
- Rung, Johan Daniel,
- Rusby, Henry Hurd,
- Ruysch, Frederik,
- Rydberg, Per Axel,