Species from North America except Canada and a few western states.
Common name: Violet woodsorrel
Photographed at Arkansas Arboretum at Pinnacle Mountain State Park
I think this is a type of mustard. Any help would be appreciated.
Red-spotted on tri-foliate leaves. Flowering talk 6-10 inches in length. About 10 flowers per stalk. Flowers are yellow, 5 petals, approximately 1 inch long.
The Oxalidaceae, or wood sorrel family, are a small family of eight genera of herbaceous plants, shrubs and small trees, with the great majority of the 900 species in the genus Oxalis (wood sorrels). Members of this family typically have divided leaves, the leaflets showing "sleep movements", spreading open in light and closing in darkness.