Pink Wood Sorrel

The primary subject is identified as a flowering plant in the genus Oxalis, commonly known as wood sorrel. The key features are the flowers, which have five distinct, rounded, pinkish-purple petals and a contrasting yellow-green throat. Based on this coloration, the umbel-like inflorescence, and its presence as a lawn weed in Austin, Texas, the species is identified as Oxalis debilis, an introduced species from South America.