1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum amarum Elliott

        This species is accepted, and its native range is E. U.S.A. to Honduras, Caribbean.

    [GB]
    Habit
    Perennial; culms solitary, or caespitose. Rhizomes elongated. Culms erect; 30-200 cm long. Culm-internodes glaucous; distally glabrous. Leaf-sheaths without keel. Ligule a ciliate membrane; 2-3.5 mm long. Leaf-blades flat, or conduplicate; 10-50 cm long; 3-15 mm wide; glaucous. Leaf-blade surface glabrous. Leaf-blade margins smooth.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; lanceolate; 10-35 cm long; 3-10 cm wide; 0.25-0.33 of culm length. Primary panicle branches appressed. Panicle branches glabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acuminate; 4.5-6 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acuminate; 4.5-6 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5-0.66 length of spikelet; membranous; without keels; 5-7 -veined. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex acuminate.
    Florets
    Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5 -veined; acuminate. Fertile lemma oblong, or ovate; dorsally compressed; 3-3.5 mm long; indurate; shiny; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Distribution
    North America: northeast USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana and Caribbean.
    Reference
    Paniceae. Gr Texas 1994.

    Images

    Distribution

    Native to:

    Alabama, Bahamas, Belize, Bermuda, Connecticut, Cuba, Delaware, Florida, Georgia, Honduras, Louisiana, Maryland, Masachusettes, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mississippi, New Jersey, New Mexico, New York, North Carolina, Pennsylvania, Rhode I., South Carolina, Texas, Trinidad-Tobago, Virginia, West Virginia

    Panicum amarum Elliott appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nuttall, T. [s.n.], New Jersey K000674439
    Hooker, J. D. [s.n.], Connecticut K000674440
    Elliott, S. [s.n.], Connecticut K000674436
    Elliott, S. [s.n.], USA K000674438
    Barratt, J. [s.n.], Connecticut K000674437

    First published in Sketch Bot. S. Carolina 1: 121 (1816)

    Accepted by

    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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.
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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

    Kew Science Photographs
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/