Cayratia japonica (Thunb.) Gagnep.

POWO follows these authorities in synonymising this name:

• Chayamarit, K. & Balslav, H. (eds.) (2020). Flora of Thailand 14(4): 511-669. The Forest Herbarium, Royal Forest Department. [Cited as Causonis japonica.]
• Knapp, W.M. & Naczi, R.F.C. (2021). Vascular plants of Maryland, USA. A comprehensive account of the state's botanical diversity. Smithsonian Contributions to Botany 113: 1-151. [Cited as Causonis japonica.]

This name was accepted following an alternative taxonomy by these authorities:

• Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST. [Cited as Cayratia japonica.]
• George, A.S., Orchard, A.E. & Hewson, H.J. (eds.) (1993). Oceanic islands 2. Flora of Australia 50: 1-606. Australian Government Publishing Service, Canberra. [Cited as Cayratia japonica.]
• Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne. [Cited as Cayratia japonica.]
• Hancock, I.R. & Henderson, C.P. (1988). Flora of the Solomon Islands. Research Bulletin Dodo Creek Research Station 7: 1-203. [Cited as Cayratia japonica.]
• Kral, R., Diamond, A.R., Ginzbarg, S.L., Hansen, C.J., Haynes, R.R., Keener, B.R., Lelong, M.G., Spaulding, D.D. & Woods, M. (2011). Annotated checklist of the vascular plants of Alabama: 1-112. Botanical reseach institute of Texas. [Cited as Cayratia japonica.]
• Morat, P. (ed.) (2004). Flore de la Nouvelle-Calédonie et Dépendances 25: 1-165. Muséum National d'Histoire Naturelle, Paris. [Cited as Cayratia japonica.]
• Pandey, R.P. & Dilwakar, P.G. (2008). An integrated check-list flora of Andaman and Nicobar islands, India. Journal of Economic and Taxonomic Botany 32: 403-500. [Cited as Cayratia japonica.]
• Samanta, A.K. (2014). An account of the family Vitaceae in Darjeeling and Sikkim himalayas, India. Journal of Economic and Taxonomic Botany 38: 90-97. [Cited as Cayratia japonica.]
• Sarmah, K.K. & Borthakur, S.K. (2009). A checklist of angiospermic plants of Manas national park in Assam, India. Pleione 3: 190-200. [Cited as Cayratia japonica.]
• Wu, Z., Raven, P.H. & Hong, D. (eds.) (2007). Flora of China 12: 1-534. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis). [Cited as Cayratia japonica.]