Sweet potato tattoo means where the heart belongs. Giving sweet potatoes to others is equivalent to confession. Sweet potato itself is an annual herb, with oval or spindle root tubers growing underground. Different varieties have different colors.
Sweet potato is native to Southeast Asia. The stem of sweet potato lies flat with many branches, usually cylindrical. The leaves are mostly wide ovate, the cymes are mostly axillary, and there are several flowers on them, generally pink, white or purple.