The very showy flower of Passiflora incarnata, also called the Maypop, has been used in herbal remedies for years. Native to the United States and cultivated mostly in Florida, it is the dried flowers and fruiting parts used. Among many constituents, passion flower contains alkaloids (mainly harman and associated compounds), flavonoids, glycosides, sugars and sterols. Passion flower has been reported to have analgesic and sedative properties. Harman, as well as some of the flavonoids have been reported as tranquilizing agents. These activities, although weak, have made passion flower a common ingredient in sedative, relaxing, and sleep aid products. These may be in the form of capsules, tinctures, or teas. Passion flower is often added to valerian root extracts, as these botanicals compliment one another as sedatives and sleep aids. Plant powders, extracts, and standardized extracts are all available from passion flower. The usefulness of the extraction and standardization processes is not completely known.