To cite package ‘ftolr’ in publications use:

  Nitta J (2024). _ftolr: Data for the Fern Tree of Life (FTOL)_. R
  package version 1.6.0, <https://github.com/fernphy/ftolr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ftolr: Data for the Fern Tree of Life (FTOL)},
    author = {Joel Nitta},
    year = {2024},
    note = {R package version 1.6.0},
    url = {https://github.com/fernphy/ftolr},
  }