1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum hemitomon Schult.

        This species is accepted, and its native range is S. New Jersey to E. Texas.

    [GB]
    Habit
    Perennial. Rhizomes elongated. Stolons present. Butt sheaths pilose. Culms decumbent; 50-150 cm long. Ligule a ciliate membrane; 1 mm long. Leaf-blades lanceolate; 12-30 cm long; 7-15 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 10-30 cm long; 1-1.5 cm wide; contracted about primary branches. Primary panicle branches appressed; 2-10 cm long; bearing spikelets almost to the base. Panicle branches bearded in axils. Spikelets appressed; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute; 2-2.6 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute; 2-2.6 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
    Florets
    Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5 -veined; acute. Palea of lower sterile floret 0.9 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.8-2.4 mm long; cartilaginous; shiny; without keel. Lemma margins involute. Lemma apex acute. Palea involute; cartilaginous.
    Distribution
    North America: northeast USA, south-central USA, and southeast USA.
    Reference
    Paniceae. Gr Texas 1994.

    Distribution

    Native to:

    Alabama, Delaware, Florida, Georgia, Louisiana, Maryland, Mississippi, New Jersey, North Carolina, South Carolina, Tennessee, Texas, Virginia

    Introduced into:

    Cuba

    Panicum hemitomon Schult. appears in other Kew resources:

    First published in Mant. 2: 227 (1824)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    Literature

    Kew Backbone Distributions
    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • 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