Ilex theezans, also I. theæzans and I. theazans, is a species of the Ilex genus in the Aquifoliaceae family, native to Brazil and typically found amid its Atlantic Forest vegetation. It is sometimes used as an adulterant of maté and sometimes confused with the yerba maté (I. paraguarensis.) In Brazil, it is sometimes called orelha-de-mico; but is more often simply known as congonha ("holly") or caúna (along with I. dumosa.