To cite package ‘setariaviridis’ in publications use:

  Ando K (2021). _setariaviridis: Setaria Viridis Data_. R package
  version 0.0.1, <https://github.com/nononoexe/setariaviridis>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {setariaviridis: Setaria Viridis Data},
    author = {Keisuke Ando},
    year = {2021},
    note = {R package version 0.0.1},
    url = {https://github.com/nononoexe/setariaviridis},
  }