1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus × townsendii (H.Groves & J.Groves) P.M.Peterson & Saarela

        This species is accepted, and its native range is Spontaneous hybrid between a native and introduced taxon originating in W. Europe.

    [GB]
    Habit
    Perennial. Rhizomes elongated; fleshy. Culms erect; 30-130 cm long. Leaf-sheaths without keel. Ligule a fringe of hairs; 1-2 mm long. Leaf-blades persistent; 6-30 cm long; 4-12 mm wide. Leaf-blade surface ribbed. Leaf-blade apex acuminate; hardened.
    Inflorescences
    Inflorescence composed of racemes. Racemes 2-9; digitate, or borne along a central axis; erect; unilateral; 4-15 cm long. Central inflorescence axis 0-10 cm long. Rhachis angular; smooth on margins; terminating in a barren extension; extension bristle-like; extension 10-20 mm long. Spikelet packing broadside to rhachis; regular; 2 -rowed. Spikelets appressed; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; compressed strongly; 12-18 mm long; 2-2.5 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; compressed strongly; 12-18 mm long; 2-2.5 mm wide; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets. Lower glume linear; 0.6-0.7 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent. Lower glume apex acute. Upper glume lanceolate; 12-18 mm long; 1 length of adjacent fertile lemma; herbaceous; with membranous margins; 1-keeled; 1-3 -veined. Upper glume surface pubescent. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 12-18 mm long; herbaceous; much thinner on margins; keeled; 1-3 -veined. Lemma surface puberulous; hairy above. Lemma apex acute. Palea 1.1 length of lemma; 2 -veined.
    Flowers
    Lodicules absent. Anthers 3; 5-7.9 mm long; indehiscent. Stigmas protogynous; terminally exserted; pubescent.
    Fruits
    Caryopsis with tardily free pericarp; linear. Embryo 1 length of caryopsis. Hilum punctiform.
    Distribution
    Europe: northern, central, and southwestern. Australasia: Australia and New Zealand.
    Reference
    Cynodonteae. CEH.

    Images

    Distribution

    Introduced into:

    Belgium, British Columbia, Denmark, France, Germany, Great Britain, Ireland, Italy, Netherlands, New Zealand North, New Zealand South, South Australia, Spain, Victoria, Washington

    Sporobolus × townsendii (H.Groves & J.Groves) P.M.Peterson & Saarela appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jul 5, 1927 Groves, J. [1481], United Kingdom Spartina × townsendii K000710271 Unknown type material
    Jul 5, 1927 Groves, H. [s.n.], United Kingdom Spartina × townsendii K000710272 Unknown type material
    Neyraut, E.J. [440], France Spartina × townsendii K000885865
    Neyraut, E.J. [3598], France Spartina × townsendii K000885866

    First published in Taxon 63: 1236 (2014)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Saarela, J.M. (2012). Taxonomic synopsis of invasive and native Spartina (Poaceae, Chloridoideae) in the Pacific Northwest (British Columbia, Washington, Oregon), including the first report of Spartina ×townsendii for British Columbia, Canada PhytoKeys 10: 25-82.
    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • Mallett, K. (ed.) (2005). Flora of Australia 44B: 1-486. Australian Government Publishing Service, Canberra.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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