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