Trias-Blasi, A. & Suksathan, P. (2013) Delimitation in the Veratrum mengtzeanumV. 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