1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne arfakensis Ohwi

        This species is accepted, and its native range is New Guinea to N. Vanuatu.

    [GB]
    Habit
    Perennial. Culms geniculately ascending, or rambling; 65-110 cm long. Culm-internodes smooth; distally glabrous. Lateral branches ample. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface; outer margin hairy. Ligule a fringe of hairs; 2 mm long. Leaf-blades lanceolate; 5-15 cm long; 6-12 mm wide. Leaf-blade surface scabrous; rough adaxially; pubescent; hairy abaxially. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Peduncle antrorsely scabrous above. Panicle open; oblong, or ovate; 8-20 cm long. Primary panicle branches ascending. Panicle axis scabrous. Panicle branches stiff; scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.5-1.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes terete.
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.5-1.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes terete.
    Glume
    Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1.5-1.8 mm long; 1 length of upper glume; 1 length of spikelet; membranous; without keels; 7 -veined. Lower glume surface smooth, or asperulous; glabrous, or hispidulous; hairy at apex. Lower glume apex obtuse. Upper glume ovate; 1.5-1.8 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 7 -veined. Upper glume surface smooth, or asperulous; glabrous, or hispidulous; hairy generally. Upper glume apex obtuse.
    Florets
    Fertile lemma elliptic, or orbicular; 1.5-1.8 mm long; coriaceous; without keel. Lemma surface glabrous, or puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
    Distribution
    Asia-tropical: Malesia and Papuasia.
    Reference
    Isachneae. Reeder 1997.

    Distribution

    Native to:

    Bismarck Archipelago, New Guinea, Vanuatu

    Isachne arfakensis Ohwi appears in other Kew resources:

    First published in Bot. Mag. (Tokyo) 56: 4 (1942)

    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.
    • Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.

    Literature

    Kew Backbone Distributions
    • Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.

    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