@article{1990,  volume={4},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33061990000200007},  DOI={10.1590/S0102-33061990000200007},  number={2},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  year={1990},  month={Dec},  pages={101–130} }