Calendula is a genus of about 15-20 species of annual plants in the daisy family that are often know as marigolds. The common name marigold refers to a larger group of plants that includes calendula. Calendula is most commonly known for its topical use as an infused oil for wounds and skin trauma, and is often used to sooth sensitive or irritated skin. Calendula has been show to help heal wounds faster, possibly by increasing blood flow and oxygen to the affected area, which helps the healing process. Calendula extract has moisturizing properties making it ideal for dry, irritated or delicate skin.