1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis densiflora (J.Presl) Steud.

        This species is accepted, and its native range is Peru to Bolivia.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 38-60 cm long. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 3-7 mm long. Leaf-blades conduplicate, or involute; 7-15 cm long; 2-3 mm wide; stiff. Leaf-blade surface scabrous. Leaf-blade apex pungent.
    Inflorescences
    Inflorescence a panicle; subtended by an inflated leaf-sheath. Panicle contracted; linear, or oblong; 9-18 cm long; 1.7-3 cm wide. Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous, or puberulous.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.7-6.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous, or pubescent. Floret callus hairs 0.5 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.7-6.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous, or pubescent. Floret callus hairs 0.5 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5.7-6.1 mm long; 1.2-1.3 length of adjacent fertile lemma; membranous; purple; 1-keeled. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 4.5-5 mm long; membranous; without keel. Lemma surface smooth, or scaberulous. Lemma apex dentate; 3 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.6 way up back of lemma; straight; 3.5-4.5 mm long overall. Rhachilla extension 1.7-2 mm long; pilose; with 3-3.5 mm long hairs.
    Flowers
    Lodicules 2. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    South America: western South America.
    Reference
    Aveneae. Tovar 1995.

    Distribution

    Native to:

    Bolivia, Peru

    Calamagrostis densiflora (J.Presl) Steud. appears in other Kew resources:

    First published in Nomencl. Bot., ed. 2, 1: 250 (1840)

    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.
    • 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
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
    • 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

    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