Marigold (calendula) petals are obtained from the same species as yellow calendula – C. officinalis, the species name given to plants designated as being “of the officina,” or the apothecary of medieval monasteries where monks prepared herbal formulas. Whole calendula flowers are a colorful and flavorful addition to tea blends, soups, salads, quiche and many other foods and beverages. Calendula flowers ae also an excellent cosmetic ingredient with an abundance of skin-loving chemical compounds.