Dos Santos, F.D.A.R. and Melhem, T.S. 2000. Ornamentation Croton-pattern in the pollen grains of Brazilian Scrophulariaceae. Acta Botanica Malacitana. 25, (Dec. 2000), 81–92. DOI:https://doi.org/10.24310/abm.v25i0.8474.