It had long been thought, at least by some, to belong in the order Celastrales. In a phylogenetic study of that order in 2006, Pottingeria was found to be a member of the order, but not of any of its families. It was in an unresolved pentatomy consisting of Parnassiaceae, Pottingeria, Mortonia, the pair (Quetzalia + Zinowiewia), and the other genera of Celastraceae. When the APG III system was published in October 2009, the Angiosperm Phylogeny Group expanded Celastraceae to include all members of the pentatomy mentioned above. Armen Takhtajan had placed Pottingeria in a monotypic family in 1987, but he later treated it as a subfamily of Celastraceae.
- Herbert K. Airy-Shaw; David F. Cutler & Siwert Nilsson (1973), "Pottingeria, its taxonomic position, anatomy, and palynology", Kew Bulletin, 28 (1): 97–104, doi:10.2307/4117067
- Li-Bing Zhang & Mark P. Simmons (2006), "Phylogeny and delimitation of the Celastrales inferred from nuclear and plastid genes", Systematic Botany, 31 (1): 122–137, doi:10.1600/036364406775971778
- Peter F. Stevens (2001 onwards). Celastrales At: Angiosperm Phylogeny Website. At: Missouri Botanical Garden Website.
- James L. Reveal. 2008 onward. "A Checklist of Family and Suprafamilial Names for Extant Vascular Plants." At: Home page of James L. Reveal and C. Rose Broome. (see External links below).
- "Celastraceae" pages 411-412. In: Armen L. Takhtajan (Takhtadzhian). Flowering Plants second edition (2009). ISBN 978-1-4020-9608-2.