BioStor
 | A New Species of Hybanthus (Violaceae) from Panama Carol A Todzia (1989) Annals of the Missouri Botanical Garden 76: 360-362 |
 | Two new species of Hybanthus (Violaceae) from Central America and a regional key for the genus H E Ballard Jr., M A Wetter and N Zamora (1997) Novon 7: 221-226 |