What are the Therapeutic Properties of Marigold (Calendula Officinalis)? Introduction The word Calendula is derived from the Latin word ‘Calendae’ which means ‘little calendar’ or ‘little clock’ because of its promptness in flowering on the new moon or beginning of the new calendar month, hence it is named as calendula. It is an annual or perennial herb that grows up to 1 to 2 feet in height. It is native to southern Europe. Nowadays, it is cultivated throughout the globe