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

        This species is accepted, and its native range is N. South America.

    [GB]
    Habit
    Annual. Culms decumbent; 5-30 cm long. Culm-internodes 4-6 cm long; distally glabrous. Culm-nodes black; glabrous. Lateral branches ample; arising from lower culm and mid culm. Leaf-sheaths mostly shorter than adjacent culm internode; striately veined; glabrous on surface. Ligule an eciliate membrane; 0.6-1 mm long. Leaf-blades 18-40 cm long; 2-3 mm wide. Leaf-blade surface hispid; densely hairy. Leaf-blade margins tuberculate-ciliate; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Peduncle 10 cm long; glabrous. Panicle open; ovate; effuse; 3-7 cm long; 2-5 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; 1-1.2 mm long; 0.5-0.6 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; 1-1.2 mm long; 0.5-0.6 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5-0.6 mm long; 0.5 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume ovate; 0.9 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 3-5 -veined; acute. Palea of lower sterile floret 0.6-0.7 mm long. Fertile lemma obovate; dorsally compressed; 1 mm long; indurate; pallid; without keel. Lemma surface smooth. Lemma margins involute. Palea involute; indurate.
    Distribution
    South America: northern South America and Brazil.
    Reference
    Paniceae. Fl Guiana 1995.

    Images

    Distribution

    Native to:

    French Guiana, Suriname, Venezuela

    Panicum arctum Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1947 Maguire, B. [24214], Surinam K000309245 isotype
    Ule, E. [8362], Brazil K001059152

    First published in Bull. Torrey Bot. Club 75: 87 (1948)

    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.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    Literature

    Kew Backbone Distributions
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    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