1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis guamanensis Escalona

        This species is accepted, and its native range is SW. Colombia to Ecuador.

    [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. 3500 - 4500 m.; Andes.
    Habit
    Hierba
    Conservation
    No Evaluada
    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Basal innovations intravaginal. Culms erect; 6-15 cm long. Leaf-sheaths smooth. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades conduplicate; 2-8 cm long; 2-3 mm wide. Leaf-blade midrib indistinct.
    Inflorescences
    Inflorescence a panicle. Peduncle 7-14 cm long. Panicle open; lanceolate; 5-8 cm long; 1-2 cm wide. Panicle axis glabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 1 mm long. Floret callus pilose. Floret callus hairs 0.5 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 1 mm long. Floret callus pilose. Floret callus hairs 0.5 length of lemma.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 4-5 mm long; 1 length of upper glume; membranous; purple (at tip); 1-keeled; 3 -veined. Lower glume apex acute. Upper glume lanceolate; 4-5 mm long; 1.6 length of adjacent fertile lemma; membranous; purple (at tip); 1-keeled; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 2.5-3 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; straight, or curved; 7-9 mm long overall. Palea 2 mm long. Palea keels scaberulous. Rhachilla extension 1.5 mm long; villous; with 2 mm long hairs.
    Flowers
    Anthers 3; 1 mm long; purple.
    Fruits
    Caryopsis with adherent pericarp; ovoid. Endosperm liquid.
    Distribution
    South America: western South America.
    Reference
    Aveneae. Escalona 2004.

    Distribution

    Native to:

    Colombia, Ecuador

    Calamagrostis guamanensis Escalona appears in other Kew resources:

    First published in Phytologia 65: 340 (1988)

    Accepted by

    • (2019). https://doi.org/10.3897/phytokeys.122.33032 epublication.
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • 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.

    Literature

    Kew Backbone Distributions
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • 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.

    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