Spathacanthus hoffmannii Lindau. Image modified from Durkee (1986) Flora Costaricensis, No. 18, page 19. The image shows an elliptic leaf of S. hoffmannii, flowers with a five-lobed corolla and the 2-segments of calyx equally or subequally divided, with its large woody fruit.
Part of: Burgos-Hernández M, Castillo-Campos G (2020) Taxonomic revision of the Mesoamerican genus Spathacanthus (Justicieae, Acanthoideae, Acanthaceae). PhytoKeys 144: 31-55. https://doi.org/10.3897/phytokeys.144.46929