Monteiro, F. K. D. S., Fernando, E. M. P., Lucena, M. D. F. D. A., & Miranda De Melo, J. I. (2018).

A new species of northeastern Brazilian endemic genus Harpochilus (Acanthaceae)

. Phytotaxa, 358(3), 289–294. https://doi.org/10.11646/phytotaxa.358.3.6