@article{sallés_longhi-wagner_1990,  title={Chave ilustrada para as espécies de Piptochaetium Presl (Gramineae - Stipeae) do Brasil},  volume={4},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33061990000300019},  DOI={10.1590/S0102-33061990000300019},  number={2},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Sallés, Jaime Mujica and Longhi-Wagner, Hilda Maria},  year={1990},  pages={183–195} }