Wyethia amplexicaulis is a perennial flowering plant commonly referred to as mule's ear. It is a yellow flowered member of the aster family that is native to western North America and has been used for both medicinal and cultural purposes. Other common names for Wyethia amplexicaulis include arrowleaf balsamroot, thickstem aster, and big-leaf mule ears. Its large leaves and bright, showy flowers make it a popular ornamental plant in gardens and landscapes. Regardless of what it is called, this plant has a distinctive beauty that is hard to miss in the wild or in gardens.