1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida boninensis Ohwi & Tuyama

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Rhizomes short. Culms 10-30 cm long; 0.3-0.6 mm diam.; 1-2 -noded. Culm-internodes smooth. Leaves mostly basal. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blades conduplicate; 5-12 cm long; 1-1.5 mm wide; stiff. Leaf-blade surface glabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; elliptic; effuse; 5-8 cm long; 2-4 cm wide. Primary panicle branches ascending; 1-2 -nate. Panicle axis smooth. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.3-1.5 mm long; pubescent; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.3-1.5 mm long; pubescent; acute.
    Glume
    Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 6-9 mm long; 0.66 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 9-12 mm long; 1.5-1.7 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma linear; subterete; 6-7 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn 3-branched; with 40-60 mm long limb; with twisted column. Column of lemma awn 6-7 mm long. Lateral lemma awns 15-20 mm long; shorter than principal.
    Flowers
    Anthers 3.
    Distribution
    Asia-temperate: eastern Asia.
    Reference
    Aristideae. Gr Japan 1997.

    Images

    Distribution

    Native to:

    Ogasawara-shoto

    Aristida boninensis Ohwi & Tuyama appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Tuyama, T. [s.n.], Japan K000906047

    First published in Bot. Mag. (Tokyo) 51: 126 (1937)

    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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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