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  1. Family: Poaceae Barnhart
    1. Genus: Apera Adans.
      1. Apera interrupta (L.) P.Beauv.

        This species is accepted, and its native range is Europe to W. Pakistan, NW. Africa.

    [GB]
    Habit
    Annual; culms solitary, or caespitose. Culms erect, or geniculately ascending; 10-70 cm long; 2-4 -noded. Leaf-sheaths smooth. Ligule an eciliate membrane; 2-5 mm long. Leaf-blades convolute; 5-12 cm long; 0.5-4 mm wide. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; ovate; interrupted; 3-20 cm long; 0.4-1.5 cm wide. Primary panicle branches appressed, or ascending; bearing spikelets almost to the base. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5-2 mm long; scaberulous.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Glume
    Glumes persistent; similar; exceeding apex of florets; shiny. Lower glume lanceolate; 1-2 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 2-2.5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 2-2.5 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn subapical; straight; 4-10 mm long overall. Palea 0.75 length of lemma; 2 -veined.
    Flowers
    Anthers 3; 0.3-0.4 mm long.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid. Endosperm liquid.
    Distribution
    Europe: northern, central, southwestern, southeastern, and eastern. Africa: north and Macaronesia. Asia-temperate: Soviet Middle Asia, Caucasus, and western Asia. Australasia: Australia. North America: western Canada, northwest USA, and north-central USA. South America: southern South America.
    Reference
    Aveneae. FW 1995.

    Distribution

    Doubtfully present in:

    Albania, Bulgaria, Portugal

    Native to:

    Afghanistan, Algeria, Austria, Czechoslovakia, France, Germany, Great Britain, Hungary, Iran, Iraq, Italy, Kazakhstan, Kirgizstan, Krym, Lebanon-Syria, North Caucasus, Pakistan, Romania, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Uzbekistan, Yugoslavia

    Introduced into:

    Argentina Northwest, Argentina South, Arizona, Belgium, British Columbia, California, Chile Central, Colorado, Hawaii, Idaho, Illinois, Indiana, Maine, Masachusettes, Michigan, Missouri, Montana, Nevada, New Jersey, New Mexico, New York, Ohio, Ontario, Oregon, South Dakota, Utah, Victoria, Washington, Wisconsin, Wyoming

    Synonyms

    Other Data

    Apera interrupta (L.) P.Beauv. appears in other Kew resources:

    Bibliography

    First published in Ess. Agrostogr.: 31 (1812)

    Accepted by

    • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
    • Larson, G.E. (2010). New vascular plant records for South Dakota Journal of the Botanical Research Institute of Texas 4: 467-470.
    • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Takhtajan, A.L. (ed.) (2006). Conspectus Florae Caucasi 2: 1-466. Editio Universitatis Petropolitanae.
    • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
    • Davis, P.H. (ed.) (1985). Flora of Turkey and the East Aegean Islands 9: 1-724. Edinburgh University Press, Edinburgh.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.
    • Bor, N.L. (1970). Flora Iranica 70: 1-573. Naturhistorisches Museums Wien.
    • Bor, N.L. (1968). Flora of Iraq 9: 1-588. Ministry of Agriculture & Agrarian Reform, Baghdad.

    Literature

    Kew Backbone Distributions

    • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
    • Larson, G.E. (2010). New vascular plant records for South Dakota Journal of the Botanical Research Institute of Texas 4: 467-470.
    • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Takhtajan, A.L. (ed.) (2006). Conspectus Florae Caucasi 2: 1-466. Editio Universitatis Petropolitanae.
    • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
    • Davis, P.H. (ed.) (1985). Flora of Turkey and the East Aegean Islands 9: 1-724. Edinburgh University Press, Edinburgh.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.
    • Bor, N.L. (1968). Flora of Iraq 9: 1-588. Ministry of Agriculture & Agrarian Reform, Baghdad.
    • Mouterde, P. (1966). Nouvelle Flore du Liban et de la Syrie 1(Texte): 1-563. Éditions de l'imprimerie Catholique, Beyrouth.
    • Ovczinnikov, P.N. (ed.) (1957). Flora Tadzhikskoi SSR 1: 1-547. Izd-vo Akademii nauk SSSR, Moskva.
    • Roshevitz, R.J. & al. (eds.) (1950). Flora Kirgizskoi SSR 2: 1-315. Frunze : Izd-vo KirgizFAN SSSR.
    • Merkodovich, N.A. (ed.) (1941). Flora Uzbekistana 1: 1-566. Izd-va Akademii nauk Uzbekskoi SSR, Tashkent.
    • Fedtschenko, B.A. & al. (1932). Flora Turkmenii 1: 1-340. Turkmenskoe gosudarstvennoe izd., Ashkhabad.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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