Tanaka, N., Averyanov, L. V., Nguyen, C. H., Maisak, T. V., Nguyen, D. T., Dai, H. V., & Chu, Q. N. (2025). Ophiopogon rugosus (Asparagaceae), a new species from northeastern Vietnam. Phytotaxa, 721(2), 167–174. https://doi.org/10.11646/phytotaxa.721.2.4