Toxicodendron rydbergii (Small ex Rydb.) Greene

POWO follows these authorities in synonymising this name:

• Flora of North America Editorial Committee (2024). Flora of North America North of Mexico 13: 1-566. Oxford University Press, New York, Oxford. [Cited as Toxicodendron radicans subsp. rydbergii.]

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

• Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico. [Cited as Toxicodendron rydbergii.]
• Gilman, A.V. (2015). New flora of Vermont. Memoirs of the New York Botanical Garden 110: 1-614. [Cited as Toxicodendron rydbergii.]
• 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 Toxicodendron rydbergii.]
• Larson, J., Reif, B., Nelson, B.E. & Hartman, R.L. (2014). Floristic studies in North Central New Mexico, U.S.A. the Sange de Cristo mountains. Journal of the Botanical Research Institute of Texas 8: 271-303. [Cited as Toxicodendron rydbergii.]
• Mohlenbrock, R.H. (2014). Vascular Flora of Illinois. A Field Guide, ed. 4: 1-536. Southern Illinois University Press, Carbondale. [Cited as Toxicodendron rydbergii.]
• Villaseñor, J.L. (2016). Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559-902. [Cited as Toxicodendron rydbergii.]
• Werier, D. (2017). Catalogue of the Vascular plants of New York state. Memoirs of the Torrey Botanical Club 27: 1-542. [Cited as Toxicodendron rydbergii.]