1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum latifolium L.

        This species is accepted, and its native range is E. Canada to Central & E. U.S.A.

    [GB]
    Habit
    Perennial. Rootstock evident. Culms erect; robust; 45-90 cm long. Culm-nodes glabrous. Lateral branches ample; arising from mid culm. Leaves heterophyllous with a basal winter rosette. Leaf-sheaths glabrous on surface, or pubescent; outer margin hairy. Ligule a ciliate membrane; 0.1-0.5 mm long. Leaf-blade base cordate. Leaf-blades ascending, or spreading; lanceolate; 8-15 cm long; 15-35 mm wide. Leaf-blade surface glabrous, or pubescent. Leaf-blade margins tuberculate-ciliate; hairy at base.
    Inflorescences
    Inflorescence a panicle. Peduncle glabrous, or pubescent above. Panicle open; ovate; 7-15 cm long. Primary panicle branches ascending. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 3.2-3.7 mm long; 1.8-2 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 3.2-3.7 mm long; 1.8-2 mm wide; falling entire.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.33-0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface pubescent. Lower glume apex obtuse, or acute. Upper glume ovate; 0.9 length of spikelet; membranous; without keels; 9 -veined. Upper glume surface pubescent. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 9 -veined; pubescent; acute. Fertile lemma elliptic; dorsally compressed; 2.5-3.2 mm long; indurate; without keel. Lemma margins involute. Palea involute; indurate.
    Flowers
    Anthers 0.8-1 mm long.
    Distribution
    North America: eastern Canada, north-central USA, northeast USA, and southeast USA.
    Reference
    Paniceae. Gr Indiana 1994.

    Distribution

    Native to:

    Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Masachusettes, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Ontario, Pennsylvania, Québec, Rhode I., South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin

    Introduced into:

    Myanmar

    Panicum latifolium L. appears in other Kew resources:

    First published in Sp. Pl.: 58 (1753)

    Accepted by

    • 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
    • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    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 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