1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne lutchuensis Hatus. & T.Koyama

        This species is accepted, and its native range is Nansei-shoto.

    [GB]
    Habit
    Annual, or perennial; short-lived; caespitose; clumped loosely. Culms geniculately ascending; slender; 10-25 cm long; 0.5-0.8 mm diam.; rooting from lower nodes. Culm-internodes smooth; distally glabrous. Lateral branches sparse. Leaf-sheaths 1.5-3 cm long; mostly shorter than adjacent culm internode; glabrous on surface; outer margin glabrous. Leaf-sheath oral hairs scanty. Ligule a fringe of hairs. Leaf-blades lanceolate; 15-40 cm long; 3-7 mm wide; light green. Leaf-blade venation with 5-7 secondary veins. Leaf-blade surface glabrous. Leaf-blade margins unthickened; entire, or undulate. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 2-5 cm long; 2-5 cm wide. Primary panicle branches ascending, or spreading; 1 -nate; 1-4.5 cm long; bearing 4-12 fertile spikelets on each lower branch. Panicle axis 4-7 noded. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular, or obovate; dorsally compressed; 1-1.3 mm long; 0.8-1 mm wide; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular, or obovate; dorsally compressed; 1-1.3 mm long; 0.8-1 mm wide; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate, or ovate; 0.8-0.9 length of spikelet; membranous; much thinner on margins; without keels; 5-9 -veined. Lower glume surface hispid; hairy above. Lower glume apex obtuse, or acute. Upper glume lanceolate, or ovate; 0.8-0.9 length of spikelet; membranous; with hyaline margins; without keels; 5-9 -veined. Upper glume surface hispid; hairy above. Upper glume apex obtuse, or acute.
    Florets
    Fertile lemma elliptic, or ovate; 1-1.3 mm long; indurate; light green; without keel. Lemma lateral veins obscure. Lemma surface glabrous, or puberulous. Lemma margins involute. Lemma apex obtuse. Palea indurate; 2 -veined.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: eastern Asia.
    Reference
    Isachneae. Gr Japan 1997.

    Distribution

    Native to:

    Nansei-shoto

    Isachne lutchuensis Hatus. & T.Koyama appears in other Kew resources:

    First published in J. Jap. Bot. 31: 235 (1956)

    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