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  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis gigas Takeda

        This species is accepted, and its native range is N. & N. Central Japan.

    [GB]
    Habit
    Perennial. Rhizomes short. Culms 80-200 cm long; 5-7 -noded. Culm-internodes smooth, or scaberulous. Leaf-sheaths smooth, or scaberulous; pubescent. Ligule an eciliate membrane; 1-3 mm long; pubescent on abaxial surface. Leaf-blades 20-35 cm long; 4-12 mm wide; stiff. Leaf-blade surface smooth, or scabrous; rough on both sides.
    Inflorescences
    Inflorescence a panicle. Peduncle antrorsely scabrous above. Panicle open; lanceolate, or ovate; 12-30 cm long; 7-15 cm wide. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5-0.75 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5-0.75 length of lemma.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume lanceolate; 4-6 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4-6 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein scabrous. Upper glume apex acuminate.
    Florets
    Fertile lemma ovate; 3.5-5.5 mm long; membranous; without keel; 3-5 -veined. Lemma lateral veins extending close to apex. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.3-0.5 way up back of lemma; straight, or geniculate; 5-6 mm long overall; without a column, or with a straight or slightly twisted column.
    Flowers
    Lodicules 2. Anthers 3; 2 mm long. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp; oblong; 2 mm long. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    Asia-temperate: eastern Asia.
    Reference
    Aveneae. Koyama 1994.

    Distribution

    Synonyms

    Other Data

    Calamagrostis gigas Takeda appears in other Kew resources:

    Bibliography

    First published in Bot. Mag. (Tokyo) 24: 43 (1910)

    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.
    • Koyama, T. (1987). Grasses of Japan and its neighboring regions: an identification manual: 1-570. Kodansha, Tokyo, Japan.

    Literature

    Kew Backbone Distributions

    • Koyama, T. (1987). Grasses of Japan and its neighboring regions: an identification manual: 1-570. Kodansha, Tokyo, Japan.

    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