Less commonly found in cultivated gardens than common bee balm, this native plant grows from eastern Canada to northeast Mexico. If you can find it in a nursery or get a start from a friend, this is a worthy garden addition. Its colors are more subdued than that of Monarda didyma but its interesting flower structure and pollinator pull make it worth growing. Common names include spotted beebalm and horsemint. It is a thyme-scented plant with purple-spotted tubular yellow flowers. According to Wikipedia, the plant contains thymol, an antiseptic and fungicide. It was historically used to treat upset stomachs, colds, diarrhea, neuralgia and kidney disease.