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Monarda is a genus of in the mint family, Lamiaceae.Harley, 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. The genus is Endemism to North America. 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 . occur at the top of the stem or emerge from the axils. They are typically crowded head-like clusters of flowers with leafy . Flower color varies, with wild species bearing red, pink, and light purple flowers. Monarda 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.
Several species, including Monarda fistulosa and Monarda didyma, have a long history of use as medicinal plants by many Native Americans, such as the Blackfoot, Menominee, Ojibwa and Ho-Chunk. The Blackfoot recognized the strong antiseptic action of the plants, and used them in for skin infections and minor wounds. Native Americans and later settlers also used it to alleviate stomach and bronchial ailments. A Herbal tea 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.Tilford, G. L. Edible and Medicinal Plants of the West.
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 in elevation.
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.
The UK National Collection of Monardas is held at Glyn Bach Gardens at Pont Hywel, Efailwen, near Llandissilio in Pembrokeshire.
Carole Whittaker of Glyn Bach Gardens was appointed International Cultivar Registration Authority for Mondarda in 2019, and currently recognises over 100 cultivars.
Cultivation
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 , 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.
Cultivars
The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:
Ecology
Monarda species are used as food plants by the of some Lepidoptera species, including case-bearers of the genus Coleophora. Coleophora monardae feeds only on Monarda plants, and C. heinrichella and C. monardella only feed on the species M. fistulosa.
Taxonomy
Monarda is in the tribe Mentheae of the subfamily Nepetoideae in the mint family. Molecular phylogenetic studies of this tribe have been poorly sampled, and relationships within it remain unclear.Ryding, P. O. 2010. Pericarp structure and phylogeny of tribe Mentheae (Lamiaceae). Plant Systematics and Evolution 285(3-4), 165–75. The genera Blephilia and Pycnanthemum are close relatives of Monarda, but they might not be the closest. Monarda is divided into two distinct subgenus, Monarda and Cheilyctis.Scora, R. W. 1967. Interspecific relationships in the genus Monarda (Labiatae). University of California Publications in Botany 41(1), 1–71. These are easily distinguished by several Phenotypic trait.
Species
Species in the genus include:
Formerly placed here
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