1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis viridis (Phil.) Soreng

        This species is accepted, and its native range is Central & S. Chile to S. Argentina.

    [GB]
    Habit
    Perennial. Rhizomes short. Culms erect; 70-100 cm long; 3-5 -noded. Leaf-sheaths antrorsely scabrous; glabrous on surface. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades 5-15 cm long; 2-4 mm wide. Leaf-blade surface scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; equilateral; 10-22 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 7-8.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.25 mm long. Floret callus 0.3-0.5 mm long; bearded. Floret callus hairs 0.66 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 7-8.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.25 mm long. Floret callus 0.3-0.5 mm long; bearded. Floret callus hairs 0.66 length of lemma.
    Glume
    Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 5.6-6.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1-1.3 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 5.5-8 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; geniculate; 6.5-7 mm long overall; with twisted column. Palea 4-4.5 mm long. Palea keels scabrous. Rhachilla extension 2-2.5 mm long; pilose; hairy throughout.
    Flowers
    Lodicules 2; 1-1.3 mm long; ciliate. Anthers 3; 1.25-1.5 mm long. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 2.5-3.2 mm long. Hilum punctiform. Endosperm liquid. Disseminule comprising a floret.
    Distribution
    South America: southern South America.
    Reference
    Aveneae. Fl Pat 1995.

    Distribution

    Native to:

    Argentina South, Chile Central, Chile South

    Calamagrostis viridis (Phil.) Soreng appears in other Kew resources:

    First published in Contr. U.S. Natl. Herb. 48: 225 (2003)

    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
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.

    Sources

    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