Guimarães, E.F., Alves, R.J.V., Santos, E.R.D. & Silva, N.G.D. (2021)

Synopsis of the Brazilian genus Symphyllophyton (Gentianaceae) with four new species

. Phytotaxa 521 (3): 159–176. https://doi.org/10.11646/phytotaxa.521.3.2