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This genus is accepted, and its native range is Medit. to W. Malesia.
Melissa officinalis

[LKGF]

Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

Morphology General Habit
Perennial herbs, ± rhizomatous, aromatic
Morphology Leaves
Leaves simple, toothed
Morphology Reproductive morphology Inflorescences
Inflorescence of axillary verticillasters, widely spaced, with 2-16 flowers per verticillaster
Morphology Reproductive morphology Inflorescences Bracts
Bracts leaf-like
Morphology Reproductive morphology Inflorescences Bracteoles
Bracteoles small, patent
Morphology Reproductive morphology Flowers
Flowers with curved pedicels
Morphology Reproductive morphology Flowers Calyx
Calyx 2-lipped, 5-lobed (3/2), ± campanulate, lobes upcurved, ciliate, posterior lip with lobes very short, lower lip with lobes long-triangular, tube 13-nerved
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped, hairy, white, cream or reddish, posterior lip shorter, with lobe rounded and emarginate, anterior lip with median lobe semiorbicular, deflexed, lateral lobes very small, ± triangular, corolla-tube dilated at throat
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, didynamous, exserted from tube, anterior pair longer, filaments ± straight, thecae divergent, confluent at base
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes subulate, subequal
Morphology Reproductive morphology Fruits
Nutlets ovoid, smooth, mucilaginous.
Note
2n = 32, 34, 64.  Four species
Ecology
Usually in forests
Distribution
Europe, Northern Africa, Macaronesia and Asia.

[LKGF]
Use
Plants used as a source of essential oils, both medicinally and as flavouring.

Native to:

Albania, Algeria, Assam, Baleares, Bulgaria, Cambodia, China South-Central, China Southeast, Corse, Cyprus, East Aegean Is., East Himalaya, France, Greece, India, Iran, Iraq, Italy, Jawa, Kirgizstan, Kriti, Laos, Lebanon-Syria, Morocco, Myanmar, Nepal, North Caucasus, Palestine, Portugal, Sardegna, Sicilia, Spain, Sumatera, Tadzhikistan, Taiwan, Thailand, Tibet, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Uzbekistan, Vietnam, West Himalaya, Yugoslavia

Introduced into:

Alabama, Argentina Northeast, Argentina Northwest, Argentina South, Arkansas, Austria, Azores, Belgium, British Columbia, California, Canary Is., Chile Central, Connecticut, Czechoslovakia, Delaware, Denmark, District of Columbia, Georgia, Germany, Great Britain, Hungary, Idaho, Illinois, Indiana, Ireland, Juan Fernández Is., Kansas, Kentucky, Krym, Louisiana, Madeira, Maine, Manitoba, Maryland, Massachusetts, Michigan, Missouri, Montana, Netherlands, New Jersey, New York, New Zealand North, New Zealand South, North Carolina, Ohio, Oklahoma, Ontario, Oregon, Pennsylvania, Poland, Québec, Rhode I., Romania, South Carolina, South European Russi, Sweden, Switzerland, Tennessee, Ukraine, Uruguay, Vermont, Virginia, Washington, West Siberia, West Virginia

Melissa L. appears in other Kew resources:

First published in Sp. Pl.: 592 (1753)

Accepted by

  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Lamiaceae Key Genus Fact Sheets

  • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp
  • Melissa L., Sp. Pl. 2: 592 (1753).
  • Mutelia Gren. ex Mutel, Fl. Franç. 3: 21 (1836).

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Lamiaceae Key Genus Fact Sheets
Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
http://creativecommons.org/licenses/by/3.0