Oxalis europaea
This low, spreading member of the Wood Sorrel family sports yellow flowers atop of clover-like leaves (leaves have a sour taste). Each 5 petalled flower measures ½ inch (1.3 cm) wide with 10 stamens and an erect, pencil-like pistil. The leaflets which measure ½ to ¾ inch (1.2 to 2 cm) wide, close at dusk and open in the morning. Plants reach a height of 6 to 15 inches (15 to 37.5 cm) and grows in waste places, along roadsides, and in fields. Flowers bloom from May to October. (There are two different flowers called Yellow Wood Sorrel in Kentucky, but they have different scientific names. The difference is the angle at which the seed pod is bent. The seed pods of Oxalis stricta are bent at a much sharper angle than the species pictured here).
