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  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis hakonensis Franch. & Sav.

        This species is accepted, and its native range is China, S. Kuril Islands, Japan.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Cataphylls inconspicuous. Rhizomes short; knotty. Culms geniculately ascending; 30-60 cm long; 0.5-1 mm diam.; 3-4 -noded. Culm-internodes 2-8 cm long. Leaves cauline. Leaf-sheaths smooth; glabrous on surface, or puberulous; with reflexed hairs; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1-1.5 mm long; truncate, or obtuse. Leaf-blades 7-30 cm long; 3-8 mm wide. Leaf-blade surface scaberulous; rough adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate, or ovate; 5-15 cm long; 1-1.5 cm wide. Primary panicle branches 2-5 -nate. 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; 3.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.75-1 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 3 mm long; 0.75-1 length of lemma.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume lanceolate; 3.5-6 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; 3.5-6 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.
    Florets
    Fertile lemma ovate; 3-5 mm long; membranous; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma apex entire, or dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 2-4 mm long overall; without a column. Rhachilla extension 1-1.5 mm long; pilose; with 1.5-2 mm long hairs.
    Flowers
    Lodicules 2. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    Asia-temperate: Soviet far east, China, and eastern Asia.
    Reference
    Aveneae. Koyama 1994.

    Distribution

    Native to:

    China North-Central, China South-Central, China Southeast, Japan, Kuril Is.

    Synonyms

    Other Data

    Calamagrostis hakonensis Franch. & Sav. appears in other Kew resources:

    Bibliography

    First published in Enum. Pl. Jap. 2: 599 (1878)

    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

    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Koyama, T. (1987). Grasses of Japan and its neighboring regions: an identification manual: 1-570. Kodansha, Tokyo, Japan.
    • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.

    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