Family Oxalidaceae Brown 1818 (wood sorrel)
Angiospermae - Oxalidales - Oxalidaceae
Parent taxon: Oxalidales according to The Angiosperm Phylogeny Group 2016
See also Hickey 1977, Mabberley 2000 and McIver and Basinger 1993
Sister taxa: Brunelliaceae, Cephalotaceae, Connaraceae, Cunoniaceae, Elaeocarpaceae, Huaceae
Subtaxa: Averrhoites Oxalidites
Ecology: "photoautotroph"
Distribution:
• Quaternary of India (1 collection)
• Eocene of Canada (1: British Columbia), United States (46: North Dakota, Wyoming)
• Clarkforkian of United States (26: North Dakota, Wyoming)
• Paleocene of Canada (1: Saskatchewan), United States (15: Colorado, Montana, North Dakota, Wyoming)
• Cretaceous of United States (1: Colorado)
Total: 91 collections each including a single occurrence