1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum irregulare Swallen

        This species is accepted, and its native range is Costa Rica, Colombia to Venezuela.

    [GB]
    Habit
    Perennial. Culms decumbent, or prostrate; 20-50 cm long; 1-1.5 mm diam.; rooting from lower nodes. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs scanty. Leaf-sheath auricles erect. Ligule a fringe of hairs. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.1 cm long; petiole pubescent. Leaf-blades lanceolate; 4.5-7 cm long; 9-15 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Peduncle 5-15 cm long. Racemes 10-15; borne along a central axis; drooping; unilateral; 1-2 cm long. Central inflorescence axis 16-24 cm long. Spikelets in pairs. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 1.7-2.2 mm long; falling entire; readily shedding fertile florets.
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 1.7-2.2 mm long; falling entire; readily shedding fertile florets.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1 mm long; 0.33-0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume apex acute. Upper glume ovate; 2 mm long; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Fertile florets with the lowest dissimilar. Lowest fertile lemma bisexual; ovate; 2.2 mm long; 1.6 length of adjacent lemma; thinner than adjacent lemma (membranous). Fertile lemma ovate; dorsally compressed; 1.4 mm long; indurate; shiny; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
    Flowers
    Anthers 3; 1.1-1.2 mm long; brown.
    Distribution
    South America: Mesoamericana.
    Reference
    Paniceae. Fl Costa Rica 1994.
    [CPLC]

    Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

    Distribution
    Nativa en Colombia; Alt. 500 - 1500 m.; Sierra Nevada de Santa Marta.
    Habit
    Hierba
    Conservation
    No Evaluada

    Distribution

    Native to:

    Colombia, Costa Rica, Venezuela

    Panicum irregulare Swallen appears in other Kew resources:

    First published in J. Washington Acad. Sci. 30: 216 (1940)

    Accepted by

    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Sources

    Catálogo de Plantas y Líquenes de Colombia
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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