Monarda is a genus of flowering plants in the mint family, Lamiaceae.[3] The genus is endemic to North America.[2][4] Common names include bergamot, bee balm, horsemint, and oswego tea, the first being inspired by the fragrance of the leaves, which is reminiscent of bergamot orange (Citrus bergamia). The genus was named for the Spanish botanist Nicolás Monardes, who wrote a book in 1574 describing plants of the New World.
The flowers are tubular and bilaterally symmetric, with a narrow upper lip and a wider lower lip. The wild flowers are single, but some cultivated forms have double flowers. They are monoecious, with male and female structures in each flower. There are two stamens. Inflorescences occur at the top of the stem or emerge from the axils. They are typically crowded head-like clusters of flowers with leafy bracts. Flower color varies, with wild species bearing red, pink, and light purple flowers. M. didyma has bright carmine red flowers, M. fistulosa has pink, and M. citriodora and M. pectinata have pale purple. Hybrids occur in the wild, and they are common in cultivation. Seed collected from hybrids does not yield plants identical to the parent.[5][6]
Uses
The crushed leaves of all species exude a spicy, fragrant essential oil. Of the species examined in one study, M. didyma contained the highest concentration of oil.[7]
Several species, including Monarda fistulosa and M. didyma, have a long history of use as medicinal plants by many Native Americans, such as the Blackfoot, Menominee, Ojibwa and Winnebago. The Blackfoot recognized the strong antiseptic action of the plants, and used them in poultices for skin infections and minor wounds. Native Americans and later settlers also used it to alleviate stomach and bronchial ailments. A tisane made from the plant was also used to treat mouth and throat infections caused by dental caries and gingivitis. Bee balm is a natural source of the antiseptic compound thymol, the primary active ingredient in some modern commercial mouthwash formulas. The Winnebago used a bee balm tisane as a general stimulant. Bee balm was also used as a carminative herb by Native Americans to prevent excessive flatulence.[8]
Although somewhat bitter due to the thymol content in the leaves and buds, the plant tastes like a mix of spearmint and peppermint with oregano. Bee balm was traditionally used by Native Americans as a seasoning for wild game, particularly birds. The plants are widespread across North America and can be found in moist meadows, hillsides, and forest clearings up to 5,000 feet (1,500 m) in elevation.[8]
Monarda plants thrive in sun and moist but well-drained soil. Plants growing in partial shade spread horizontally and produce fewer flowers. Monarda are used in beds and borders to attract hummingbirds, pollinating insects, and insects that control garden pests. They are prone to developing powdery mildew in high humidity, especially if planted in a place without good air circulation.[9]
Hybrid cultivars range from dark red mahogany to bluish lilac to multiple shades of pink. These are generally not as robust as wild species. Some hybrids have been developed to produce high levels of essential oil for use as flavoring or medicine.[10]
Monarda didyma L. – Oswego tea, scarlet beebalm, fragrantbalm, mountain-mint - eastern United States, especially Appalachians, eastern Canada
Monarda eplingiana Standl. - Coahuila
Monarda fistulosa L. – wild bergamot, mintleaf beebalm, horse-mint, purple beebalm - widespread across most of United States + Canada; Tamaulipas, Nuevo León; cultivated in China and elsewhere[21]
^"Genus: Monarda L."Germplasm Resources Information Network. United States Department of Agriculture. 2004-09-10. Archived from the original on 2012-05-31. Retrieved 2011-10-08.
^ abHarley, R. M., et al. 2004. "Labiatae". pp 167-275 In: Kubitzki, K. (editor) and J. W. Kadereit (volume editor). The Families and Genera of Vascular Plants volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN978-3-540-40593-1
^Whitten, W. M. (Mar 1981), "Pollination ecology of Monarda didyma, M. clinopodia, and hybrids (Lamiaceae) in the Southern Appalachian Mountains", American Journal of Botany, 68 (3): 435–442, doi:10.2307/2442781, JSTOR2442781
^"Glynbachgardens". www.glynbachgardens.co.uk. Retrieved 24 August 2018.
^Carole, Whittaker. "Monarda". Glyn Bach Gardens. Retrieved 12 October 2023.
^Ryding, P. O. 2010. Pericarp structure and phylogeny of tribe Mentheae (Lamiaceae). Plant Systematics and Evolution 285(3-4), 165–75. doi:10.1007/s00606-010-0270-9
^Scora, R. W. 1967. Interspecific relationships in the genus Monarda (Labiatae). University of California Publications in Botany 41(1), 1–71.
Gardner, J. (1998). Herbs in bloom: A guide to growing herbs as ornamental plants. Portland, Oregon:Timber Press.((cite book)): CS1 maint: location missing publisher (link)
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