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Passiflora incarnata, commonly known as maypop, purple passionflower, true passionflower, wild apricot, and wild passion vine, is a fast-growing perennial vine with climbing or trailing stems. A member of the passionflower genus Passiflora, the maypop has large, intricate flowers with prominent styles and stamens. One of the hardiest species of passionflower, it is a common wildflower in the southern United States. The Cherokee in the Tennessee area called it ocoee; the Ocoee River and valley are named after this plant, which is the Tennessee state wildflower.[1] This, and other passionflowers are the exclusive larval host plants for the Gulf fritillary and non-exclusive for the variegated fritillary butterflies.[2]

Passiflora incarnata
Passion Vine NBG LR.jpg
Passiflora incarnata fruit.jpg
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Passifloraceae
Genus: Passiflora
Species: P. incarnata
Binomial name
Passiflora incarnata
L., 1753
Passiflora incarnata map.jpg



The stems can be smooth or pubescent; they are long and trailing, possessing many tendrils. Leaves are alternate and palmately 3-lobed and occasionally 5-lobed, measuring 6–15 centimetres (2.4–5.9 in). They have two characteristic glands at the base of the blade on the petiole. Flowers have five bluish-white petals. They exhibit a white and purple corona, a structure of fine appendages between the petals and stamens. The large flower is typically arranged in a ring above the petals and sepals. They are pollinated by insects such as bumblebees and carpenter bees, and are self-sterile. The flower normally blooms in July.[citation needed]

The fleshy fruit, also referred to as a maypop, is an oval yellowish berry about the size of a hen egg; it is green at first, but then becomes orange as it matures. As with other passifloras, it is the larval food of a number of butterfly species, including the zebra longwing and Gulf fritillary. In many cases its fruit is very popular with wildlife. The egg-shaped green fruits 'may pop' when stepped on. This phenomenon gives the P. incarnata its common name.

The maypop occurs in thickets, disturbed areas, near riverbanks, and near unmowed pastures, roadsides, and railroads. It thrives in areas with lots of available sunlight. It is not found in shady areas beneath a forest canopy.[citation needed]

Passiflora incarnata

Agricultural practicesEdit

Passiflora incarnata is easily cultivated. The maypop in the wild is an aggressive vine and native to the Southeast extending into the central portion of the US reaching Illinois, Indiana, Ohio.[3] The plants grow in full sun and need direct sunlight for at least half of the day. The best soils for P. incarnata are well-drained [4] but the plants tolerate occasionally wet and acidic soils. The plants have a high drought tolerance. P. incarnata can be planted all the year in zone 7–11 (hardiness zone). The space between two plants is 36–60 inches (91.44 – 152.4 cm).[3] One to two years are necessary before they begin bearing. Each flower has a very short life (about one day).[5] Then the fruit develops in two to three months.[4] The harvest depends on vine size and age of the plant but one reported 10–20 fruits per vine.[6] Seeds can be collected in the fall after the fruit has begun to shrivel . There are some problems with nematodes and caterpillars in the culture of P. incarnata.[3] The flowers appear to be perfectly suitable for bumblebee pollination. As the bees look for nectar the pollen filled flower anthers brush the back of the bee and when the bee moves to the next flower the pollen is readily transferred to the central sticky stigma.[5]

Medicinal useEdit


One review found support for P. incarnata in anxiety disorders.[7] Other review found the evidence insufficient to make any claims about health effects.[8]


Possible interactions with following medications:

  • Sedatives
  • Antiplatelets and anticoagulants
  • Monoamine oxidase inhibitors (MAOIs)

P. incarnata may increase main effects or side effects of medications listed above.[9]

For Oral Consumption; Pregnant or breast-feeding women should use caution and seek medical advice before orally consuming P. incarnata. The effects of oral ingestion of the plant compounds on reproduction or on unborn child have not been tested yet. The oral consumption of this plant may prejudice the ability to drive and use machinery. US FDA have given "GRAS" (Generally Regarded As Safe) status to the ingestion of "P.incarnata".[10][11]

Historical uses and folk medicineEdit

Historically, the plant has been used as an herbal medicine to treat nervous anxiety and insomnia.[12] The dried, ground herb is frequently used in Europe by drinking a teaspoon of it in tea. A sedative chewing gum has even been produced albeit no sedative qualities have been noted, nor medical benefits beyond placebo.[citation needed]

P. incarnata flower and bud

Passiflora incarnata has been used to reduce hypertension.[13][non-primary source needed] Methanol extractions from the leaves has been reported to be an effective antitussive in mice.[14]

After being brought to Europe, it became a popular remedy in herbology as a natural remedy for the relief of mild symptoms of mental stress, anxiety nervousness, constipation, dispepsia, mild infections and insomnia. "Today, passionflower is officially included in the national pharmacopeias of France, Germany, and Switzerland and is also monographed in the British Herbal Pharmacopoeia and the British Herbal Compendium, the ESCOP monographs, the Community Herbal Monographs of the EMA, the German Standard Licences, the German Homoeopathic Pharmacopoeia, the Homoeopathic Pharmacopoeia of the United States, and the Pharmacopeia of Egypt. In Poland, it has been prescribed to cure disorders such as hysteria and neurasthenia. Presently, P. incarnata is commonly used in phytotherapy as a mild sedative and anxiolytic. The botanical drugs included in the current European and British Pharmacopoeias are the dried aerial parts of the plant".[13]

In North America, it is used for the treatment of diarrhea, premenstrual syndrome, dysmenorrhea, neuralgia, burns, hemorrhoids, insomnia, muscle cramps, hysteria, neuralgia, and as a pain reliever for various conditions.[medical citation needed] P. incarnata is still used by Native Americans; for example, Cherokees use the root of the plant as topical antiinflammatory medicine.[citation needed] Tea made from the roots is used as a tonic for the liver and for skin boils. The extracts of P. incarnata were also used for the relief of nervousness, abdominal cramps and anxiety.[13]

In other parts of the world, P. incarnata is used for the treatment of partially different diseases. For example, in Argentina and Mexico, it is consumed for its sedative effects, whereas in Brazil it is used as an analgesic, antispasmodic, anti-asthmatic, wormicidal and sedative.[citation needed] In India however, it has been used to treat morphine dependence, but in Vietnam sleeplessness, anxiety and high blood pressure have been treated with extracts from this plant.[citation needed] In the Middle East P. incarnata has again slightly different applications, for example in Turkey, dysmenorrhoea, epilepsy, insomnia, neurosis and neuralgia are treated with P. incarnata. But it has also been used as a sedative and narcotic medicine in Iraq. "In the African countries of Rwanda, Kenya and Congo P. incarnata is used as a folk remedy by herbalists and natural health practitioners for its sedative, nervine, anti-spasmodic and analgesic effects. In Australia, it is commonly prescribed as a sedative and anxiolytic medicine.[13]


Some notable substances in P. incarnata are flavonoids, but also alkaloids and other phyto-constituents can be found.[8]

Flavonoids are the main component in P. incarnata. They can reach up to 2.5% of the total content. The greatest concentration of flavonoids has been reported to be in the leaves. Following flavonoids can be found in P. incarnata: chrysin, apigenin, luteolin, quercetin, kaempferol and isovitexin.[15] The flavonoid chrysin is thought to be the main substance responsible for the sedative effect of P. incarnata. The anxiety-reducing property is caused by the binding of chrysin to GABA-Benzodiazepinreceptors.[16] Little amounts of alkaloids has been reported in P. incarnata (<0.005%). Examples for alkaloids are: harmol, harmine, harmalol.[15] Other substances existing in P. incarnata includes mono- and polysaccharides, amino acids and essential oils.[17]

Culinary useEdit

In cooking, the fruit of this variety is sometimes used for jam and jellies or as a substitute for its commercially grown South American relative Passiflora edulis – the fruit is of comparable size and juice yield, hence chilled maypop juice is a delicious treat in hot summer weather. The fruit can be eaten out of hand and historically it was a favorite of colonial settlers of the South and Native Americans alike. Today it is a very common plant growing in gardens in the American Southeast and parts of the Mid-Atlantic for this purpose as well as its showy violet flowers,[18] and still is a favorite of Cajuns, as evidenced by their name for the plant: liane de grenade, or "pomegranate vine".



Passiflora incarnata can potentially become an agricultural weed. The genus Passiflora introduced for agricultural purpose has been reported as an important weed in certain regions of the world.[19] The United States Department of Agriculture notes that P. incarnata is referred to as a weed by these publications:[20] Weeds of Kentucky and adjacent states: a field guide[21] and Weeds of the United States and Canada.[22]

Mechanical control as removing the suckers regularly is advised to prevent the spreading of maypop. It is also recommended to train the vines onto trellis and fences to limit propagation.[19]

Other potential useEdit

Passiflora incarnata extracts can be potentially used to produce organic sunscreens with a protective defense against UV radiations. The use of these plant compounds would diminish the concentration of synthetic UV filters in sunscreens.[23]


  1. ^ "State Symbols". Tennessee Government. Retrieved October 24, 2011. 
  2. ^ Horn, compiled and edited by Dennis Horn and Tavia Cathcart ; technical editor: Thomas E. Hemmerly ; photo editors: David Duhl and Dennis (2005). Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians : the official field guide of the Tennessee Native Plant Society. [Edmonton]: Lone Pine Pub. p. 105. ISBN 978-1-55105-428-5. 
  3. ^ a b c
  4. ^ a b
  5. ^ a b
  6. ^
  7. ^ Sarris, Jerome; McIntyre, Erica; Camfield, David A. (2013). "Plant-Based Medicines for Anxiety Disorders, Part 2: A Review of Clinical Studies with Supporting Preclinical Evidence". CNS Drugs. 27 (4): 301–319. doi:10.1007/s40263-013-0059-9. ISSN 1172-7047. PMID 23653088. 
  8. ^ a b Miroddi, M.; Calapai, G.; Navarra, M.; Minciullo, P.L.; Gangemi, S. (2013). "Passiflora incarnata L.: Ethnopharmacology, clinical application, safety and evaluation of clinical trials". Journal of Ethnopharmacology. 150 (3): 791–804. doi:10.1016/j.jep.2013.09.047. ISSN 0378-8741. PMID 24140586. 
  9. ^ Ehrlich, Steven D. "Passionflower". University of Maryland. A.D.A.M. Retrieved 22 November 2015. 
  10. ^ "CFR - Code of Federal Regulations Title 21". U.S. FOOD & DRUG ADMINISTRATION. Retrieved 16 April 2016. 
  11. ^ "Passiflora". European Medicines Agency. Retrieved 22 November 2015. 
  12. ^ Plants For A Future: Passiflora incarnata
  13. ^ a b c d Miroddi,, M (2013). "Passiflora incarnata L.: Ethnopharmacology, clinical application, safety and evaluation of clinical trials". Journal of Ethnopharmacology. 150 (3): 791–804. doi:10.1016/j.jep.2013.09.047. PMID 24140586. 
  14. ^ Dhawan, Kamaldeep; Anupam Sharma (2002). "Antitussive activity of the methanol extract of Passiflora incarnata leaves". Fitoterapia. 73 (5): 397–399. doi:10.1016/s0367-326x(02)00116-8. 
  15. ^ a b Dhawan K., Dhawan S., Sharma A. (2004). "Passiflora: a review update". Journal of Ethnopharmacology. 94 (1): 1–23. doi:10.1016/j.jep.2004.02.023. PMID 15261959. 
  16. ^ Peter, H., & Penzel, T. (2007). Enzyklopädie der Schlafmedizin. Berlin Heidelberg New York Tokio: Springer.)
  17. ^ Krenn, L. (2006). Aktuelles über Passiflora incarnata. Zeitschrift für Phytotherapie, 27(01), 47–50.
  18. ^
  19. ^ a b Mc Guire, C. M. (1999). "Passiflora incarnata (Passifloraceae): A new fruit crop". Economic Botany. 53 (2): 161–176. doi:10.1007/bf02866495. 
  20. ^ PLANTS Database. "Purple Passionflower". United States Department of Agriculture. Retrieved 22 November 2015. 
  21. ^ Haragan, P. D. (1991). Weeds of Kentucky and Adjacent States: A Field Guide. Lexington, KY: The University Press of Kentucky. ISBN 978-0-8131-3369-0. 
  22. ^ Southern Weed Science Society (1998). Southern Weed Science Society's weeds of the United States and Canada [electronic resource]. Champaign, Ill: Southern Weed Science Society. 
  23. ^ Velasco, M. V. R.; Sarruf, F. D.; Salgado-Santos, I. M. N.; Haroutiounian-Filho, C. A.; Kaneko, T. M.; Baby, A. R. (2008). "Broad spectrum bioactive sunscreens". International journal of pharmaceutics. 363 (1): 50–57. doi:10.1016/j.ijpharm.2008.06.031. 

Further readingEdit

Miroddi, M.; Calapai, G.; Navarra, M.; Minciullo, P.L.; Gangemi, S. (December 2013). "Passiflora incarnata L.: Ethnopharmacology, clinical application, safety and evaluation of clinical trials". Journal of Ethnopharmacology. 150 (3): 791–804. doi:10.1016/j.jep.2013.09.047. PMID 24140586. 

External linksEdit