noun. Any of numerous plants of the genus Oxalis, having cloverlike compound leaves usually with three leaflets and five-petaled, variously colored flowers.

noun. Any of various ornamental flowering plants of the genus Oxalis

"Astonishingly beautiful results may be had with small baskets by using only one sort of plant in each, such as oxalis, ivy geranium or some trailing flowering vines."

common wood sorrel  

wood sorrel