Botanical observations on the Azores
- Creador
- Cardot, Jules
- Warnstorf, Carl Friedrich E.
- Ellis, Job Bicknell
- Saccardo, Pier Andrea
- Trelease, William
- Underwood, Lucien Marcus
- Farlow, William Gilson
- Allen, Timothy Field
- Smith, Hamilton Lanphere
- Williams, Thomas Albert
- Norton, John Bitting Smith
- Peck, Charles Horton
- Thaxter, Roland