Over 500 names have been published for species, subspecies, and varieties within Echites, but most have been relegated to synonymy or moved to other genera. 14 species are currently accepted.
↑Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. 2009. Cucurbitaceae a Polemoniaceae. 4(1): i–xvi, 1–855. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Universidad Nacional Autónoma de México, México.
↑Morales, F. J. 1997. A reevaluation of Echites and Prestonia sect. Coalitae (Apocynaeae). Brittonia 49(3): 328–336.
↑Morales, J. F. 2009. La familia Apocynaceae (Apocynoideae, Rauvolfioideae) en Guatemala. Darwiniana 47(1): 140–184.