Grings, Martin, Ilsi Iob Boldrini, Alberto Knob, and Sérgio Augusto De Loreto Bordignon. “A New Species of Calyculogygas (Malvaceae) from Southern Brazil”. Phytotaxa 178, no. 1 (September 10, 2014): 43–49. Accessed December 6, 2025. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.178.1.5.