1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis pinetorum Swallen

        This species is accepted, and its native range is Guatemala.

    [GB]
    Habit
    Perennial. Rhizomes short. Culms erect; 120 cm long. Culm-internodes distally glabrous. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 4.5 mm long; obtuse. Leaf-blades 26-33 cm long; 5-6 mm wide. Leaf-blade surface scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; interrupted; dense; 16 cm long; 3 cm wide. Primary panicle branches ascending. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 5.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Fertile
    Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 5.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface scabrous. Lower glume apex acute. Upper glume lanceolate; 5.5-6 mm long; 1.3-1.4 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 4 mm long; membranous; without keel. Lemma apex awned; 5 -awned. Principal lemma awn dorsal; arising 0.25 way up back of lemma; geniculate; 3 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 1 mm long. Rhachilla extension 1 mm long; pubescent; with 0.5 mm long hairs. Apical sterile florets 1 in number; linear (bristle-like); 2 mm long.
    Flowers
    Lodicules 2. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    South America: Mesoamericana.
    Reference
    Aveneae. Swallen 1995.

    Distribution

    Native to:

    Guatemala

    Calamagrostis pinetorum Swallen appears in other Kew resources:

    First published in Contr. U.S. Natl. Herb. 29: 406 (1950)

    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.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions
    • 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

    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