Kayser
The taxon author Kayser may refer to
- Friedrich Heinrich Emanuel Kayser (1845–1927, Em. Kayser), German palaeontologist
- Jean Edmond Kayser (1857–1940, Kayser), French botanist, and agronomist
- Konrad Kayser (1885–1972, K. Kayser), German amateur botanist, and horticulturist