Choopan, Thiamhathai, Paul Joseph Grote, Kongkanda Chayamarit, and David Alan Simpson. 2019. “A Checklist of Acanthaceae Subfamily Nelsonioideae in Thailand”. Thai Forest Bulletin (Botany) 47 (2):241-59. https://doi.org/10.20531/tfb.2019.47.2.14.