TRIAS-BLASI, A., & SUKSATHAN, P. (2013). Delimitation in the Veratrum mengtzeanum—V. chiengdaoense complex (Melanthiaceae) in Thailand based on morphology, with commentary on conservation status. Phytotaxa, 96(1), 54–62. https://doi.org/10.11646/phytotaxa.96.1.2