1. Family: Poaceae Barnhart
    1. Genus: Glyceria R.Br.
      1. Glyceria grandis S.Watson

        This species is accepted, and its native range is Subarctic America to U.S.A.

    [GB]
    Habit
    Perennial. Rhizomes elongated. Culms erect; 90-160 cm long. Leaf-sheaths tubular for much of their length; with 0.9-1 of their length closed. Ligule an eciliate membrane; 4-9 mm long; obtuse. Leaf-blades 6-15 mm wide. Leaf-blade surface scaberulous; rough abaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 20-35 cm long. Primary panicle branches ascending, or spreading. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Fertile
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.6-1.7 mm long; 0.66 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 2.4-2.5 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 2.5-2.7 mm long; membranous; purple; without keel; 7 -veined. Lemma lateral veins distinct. Lemma apex erose; obtuse. Palea 2 -veined. Palea apex erose. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; united; oblong; fleshy; truncate. Anthers (2-)3; 0.5-0.9 mm long.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and southeast USA.
    Reference
    Meliceae. Fl Pac NW 1993.

    Images

    Distribution

    Native to:

    Alaska, Alberta, Arizona, British Columbia, California, Colorado, Connecticut, Delaware, Idaho, Illinois, Indiana, Iowa, Maine, Manitoba, Maryland, Masachusettes, Michigan, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, Newfoundland, North Carolina, North Dakota, Northwest Territorie, Nova Scotia, Ohio, Ontario, Oregon, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Yukon

    Introduced into:

    Austria, Italy

    Glyceria grandis S.Watson appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Gray, A. [s.n.] K000808463
    Drummond, T. [s.n.] K000808460
    Torrey, J. [s.n.], Canada K000808462
    Schweinitz, L.D.v. [s.n.] K000808461

    First published in A.Gray, Manual, ed. 6: 667 (1890)

    Accepted by

    • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
    • 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.

    Literature

    Kew Backbone Distributions
    • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.

    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 2018. 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 2018. 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