1. Family: Lamiaceae Martinov
    1. Origanum L.

      1. This genus is accepted, and its native range is Macaronesia, Europe, Medit. to Central China.

    [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.

    Habit
    Subshrubs or perennial herbs, sometimes gynodioecious, aromatic, branched hairs in o. dictamnus l.
    Leaves
    Leaves rather small, entire or toothed, hairy or glabrous, rarely glaucous
    Inflorescences
    Inflorescence branched, sometimes paniculate to corymbose, spicate or spiciform, spikes elongate to subglobose, erect or nodding, often pedunculate, sometimes lax or few-flowered, or compact
    Bracts
    Bracts imbricate, often showy or brightly coloured
    Bracteoles
    Bracteoles absent
    Flowers
    Flowers subsessile, single, or rarely in 2-8-flowered cymes in axils of all but lowest bracts
    Calyx
    Calyx actinomorphic and 5-lobed to strongly zygomorphic and 5- to 1-lobed: either 2-lipped, 3/2 to 1/2, lobes broadly triangular to lingulate, sometimes reduced, or calyx 1-lipped with posterior lip entire, rounded, bract-like with calyx-tube split almost
    Corolla
    Corolla 2-lipped, usually 5-lobed (2/3), white, pink or purple, lobes subequal, tube straight or curved, sometimes ventrally saccate, short or to 3 cm in o. amanum post
    Stamens
    Stamens 4, sometimes reduced or absent, usually unequal, ascending to divergent, anterior longer, usually exserted, posterior exserted to included, thecae divergent to divaricate, distinct
    Stigma
    Stigma-lobes subequal
    Disc
    Disc ± symmetrical
    Fruits
    Nutlets ovoid to apiculate, smooth.
    Note
    2n = 30 (32).  About 40 species. Many hybrids recorded. Ietswaart (1980) recognises 10 sections.
    Distribution
    Especially Mediterranean, extending through temperate Eurasia and Northern Africa, from Azores to Taiwan.  Introduced to America, Oceania and Russian Far East
    [LKGF]
    Use
    Cultivated widely as culinary and medicinal herbs, especially O. vulgare L., O. onites L. and O. majorana L., some ornamental.  Native to:

    Images

    Distribution

    Native to:

    Afghanistan, Albania, Algeria, Altay, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, Bulgaria, Buryatiya, Canary Is., Central European Rus, China North-Central, China South-Central, China Southeast, Corse, Cyprus, Czechoslovakia, Denmark, East Aegean Is., East European Russia, East Himalaya, Finland, France, Germany, Great Britain, Greece, Hungary, Iran, Iraq, Ireland, Irkutsk, Italy, Kazakhstan, Kirgizstan, Krasnoyarsk, Kriti, Krym, Lebanon-Syria, Libya, Madeira, Morocco, Nepal, Netherlands, North Caucasus, North European Russi, Norway, Pakistan, Palestine, Poland, Portugal, Romania, Sardegna, Saudi Arabia, Sicilia, Sinai, South European Russi, Spain, Svalbard, Sweden, Switzerland, Tadzhikistan, Taiwan, Tibet, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Ukraine, West Himalaya, West Siberia, Xinjiang, Yakutskiya, Yugoslavia

    Introduced into:

    Arkansas, British Columbia, California, Connecticut, Delaware, Illinois, India, Juan Fernández Is., Maryland, Masachusettes, Mexico Southwest, Michigan, New Jersey, New York, New Zealand South, North Carolina, Nova Scotia, Ohio, Ontario, Oregon, Pennsylvania, Prince Edward I., Québec, Venezuela, Vermont, Virginia, Washington

    Origanum L. appears in other Kew resources:

    First published in Sp. Pl.: 590 (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
    • Ietswaart, Leiden Bot. Ser. 4: 1-153 (1980), rev.
    • × Majoranamaracus Rech.f., Repert. Spec. Nov. Regni Veg. 45: 95 (1938).
    • × Origanomajorana Domin, Preslia 13-15: 197 (1935).
    • Schizocalyx Scheele, Flora 26: 575 (1843).
    • Beltokon Raf., Fl. Tellur. 3: 86 (1837).
    • Onites Raf., Fl. Tellur. 3: 86 (1837).
    • Oroga Raf., Fl. Tellur. 3: 86 (1837).
    • Zatarendia Raf., Fl. Tellur. 3: 86 (1837).
    • Hofmannia Heist. ex Fabr., Enum.: 61 (1759).
    • Dictamnus Zinn, Cat. Pl. Gott.: 316 (1757), (1756), nom. illeg.
    • Amaracus Hill, Brit. Herb.: 381 (1756).
    • Dictamnus Mill., Gard. Dict. Abr. ed. 4 (1754), nom. illeg.
    • Majorana Mill., Gard. Dict. Abr. ed. 4 (1754).
    • Marum Mill., Gard. Dict. Abr. ed. 4 (1754).
    • Origanum L., Sp. Pl. 2: 588 (1753)

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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