1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne rigens (Sw.) Trin.

        This species is accepted, and its native range is Guatemala, Caribbean, Venezuela to Peru.

    [GB]
    Habit
    Perennial; caespitose. Culms rambling; 100-200 cm long; 0.5-1 mm diam.; wiry. Lateral branches ample. Leaves distichous. Leaf-sheaths longer than adjacent culm internode; glabrous on surface, or pubescent; outer margin hairy. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades lanceolate; 2-5 cm long; 2-5 mm wide; herbaceous; firm. Leaf-blade midrib evident. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins cartilaginous; scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong, or ovate; 2-5 cm long. Primary panicle branches ascending, or spreading. Panicle branches stiff. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-2 mm long.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate, or orbicular; dorsally compressed; 1.8-2 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes pubescent.
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate, or orbicular; dorsally compressed; 1.8-2 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes pubescent.
    Glume
    Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.66-0.75 length of spikelet; membranous; without keels; 5 -veined. Lower glume surface puberulous. Lower glume apex obtuse. Upper glume orbicular; 0.66-0.75 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface puberulous. Upper glume apex obtuse.
    Florets
    Fertile lemma ovate, or orbicular; 1.8-2 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined. Palea surface of upper floret puberulous.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: Mesoamericana, Caribbean, northern South America, and western South America.
    Reference
    Isachneae. N Amer Fl 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. 1000 - 3000 m.; Andes, Sierra Nevada de Santa Marta.
    Habit
    Hierba
    Conservation
    No Evaluada

    Distribution

    Native to:

    Colombia, Ecuador, Guatemala, Jamaica, Leeward Is., Peru, Venezuela

    Isachne rigens (Sw.) Trin. appears in other Kew resources:

    First published in Gram. Panic.: 252 (1826)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • 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.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Jørgensen, P.M. & León-Yánez, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador Monographs in Systematic Botany from the Missouri Botanical Garden 75: i-viii, 1-1181.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    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.
    • 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.
    • Jørgensen, P.M. & León-Yánez, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador Monographs in Systematic Botany from the Missouri Botanical Garden 75: i-viii, 1-1181.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    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 2020. 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 2020. 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