@article{costa_gasper_2026,  title={Exploring leaf morphology of <i>Parablechnum cordatum</i> complex (Blechnaceae): An outline analysis approach using Elliptic Fourier Analysis for taxonomic resolution},  volume={40},  ISSN={0102-3306},  url={https://doi.org/10.1590/1677-941X-ABB-2025-0139},  DOI={10.1590/1677-941X-ABB-2025-0139},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Costa, Natália Deggau da and Gasper, André Luís de},  year={2026},  pages={e20250139} }