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

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

    [GB]
    Habit
    Perennial; caespitose. Rootstock evident. Culms erect, or geniculately ascending; 40-75 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous. Lateral branches fastigiate; arising from mid culm. Leaves basal and cauline; heterophyllous with a basal winter rosette. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule a fringe of hairs, or absent; 0-1 mm long. Leaf-blade base cordate; symmetrical. Leaf-blades lanceolate; 6-9 cm long; 9-25 mm wide; flaccid. Leaf-blade surface glabrous. Leaf-blade margins ciliate; hairy at base.
    Inflorescences
    Inflorescence a panicle; terminal and axillary. Panicle open; ovate; 6-12 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; with obtuse base; dorsally compressed; subacute; 2.4-3.3 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; with obtuse base; dorsally compressed; subacute; 2.4-3.3 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1 mm long; 0.25-0.33 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface glabrous, or puberulous. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; membranous; 7 -veined; glabrous, or puberulous; obtuse. Fertile lemma oblong; dorsally compressed; 2.4-3.3 mm long; indurate; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: north-central USA, northeast USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana and Caribbean.
    Reference
    Paniceae. Gr Texas 1994.

    Images

    Distribution

    Native to:

    Alabama, Arkansas, Bahamas, Connecticut, Cuba, Delaware, District of Columbia, Dominican Republic, El Salvador, Florida, Georgia, Guatemala, Haiti, Honduras, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland, Masachusettes, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Michigan, Mississippi, Missouri, New Jersey, New York, Nicaragua, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode I., South Carolina, Tennessee, Texas, Virginia, West Virginia

    Panicum commutatum Schult. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nash, G. V. [45], Florida Panicum equilaterale K000674482
    Nash, G. V. [240], Florida Panicum equilaterale K000674483
    Nash, G. V. [1120], Florida Panicum equilaterale K000674484

    First published in Mant. 2: 242 (1824)

    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
    • 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 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