Crocanthemum carolinianum

Crocanthemum carolinianum, commonly referred to as Carolina frostweed or Carolina sunrose, is a flowering plant that grows in the southeastern United States. Flowers have five bright yellow petals.
Helianthemum carolinianum is a synonym for it.
Areas where it grows include southern Alabama and the northern half of the Florida peninsula and Florida Panhandle.
It is in the Cistaceae family.
C. carolinianum are perennials with alternately arranged leaves. The leaves are elliptic to obovate in shape, and reach a length of 2 to 5 centimeters.