Xanthium sibiricum Patrin ex Widder

POWO follows these authorities in synonymising this name:

• (2021). https://doi.org/10.3897/BDJ.9.e75590. epublication. [Cited as Xanthium strumarium.]
• Chang, C.-S., Kim, H. & Chang, K.S. (2021). Checklist of Far East Asian Vascular Flora 2: 627-1887. EABCN, Seoul. [Cited as Xanthium strumarium.]
• Flora of North America Editorial Committee (2006). Asteraceae. Flora of North America North of Mexico 21: 1-616. Oxford University Press, New York, Oxford. [Cited as Xanthium strumarium.]
• GCC (2011). Global Compositae Checklist http://compositae.landcareresearch.co.nz/. [Cited as Xanthium strumarium subsp. sibiricum.]
• Ghafoor, A. & al. (2021). Flora of Pakistan 224: 1-310. Department of Botany, University of Karachi, Karachi. [Cited as Xanthium strumarium.]
• Hassler, M. & Muer, T. (2022). Flora Germanica: alle Farn- und Blütenpflanzen Deutschlands in Text und Bild 2: 865-1712. Verlag Regionalkultur, Uberstadt-Weiher. [Cited as Xanthium strumarium.]
• Tomasello, S. (2018). How many names for a beloved genus? Coalescent-based species delimitation in Xanthium L. (Ambrosiinae, Asteraceae). Molecular Phylogenetics and Evolution 127: 135-145. [Cited as Xanthium strumarium.]
• Wu, Z. & Raven, P.H. (eds.) (2011). Asteraceae. Flora of China 20-21: 1-992. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis). [Cited as Xanthium strumarium.]
• Zhao, Y.Z., Zhao, L.Q. & Rui, C. (eds.) (2019). Flora Intramongolica, edition 3, 5: 1-451. Typis Intramongolicae popularis, Huhhot. [Cited as Xanthium strumarium.]

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

• Kozhevnikov, A.E., Kozhevnikov, Z.V., Kwak, M. & Lee, B.Y. (2019). Illustrated flora of the Primorsky Territory, Russian Far East: 1-1124. National institute of biological resources. [Cited as Xanthium sibiricum.]