1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne hainanensis Keng f.

        This species is accepted, and its native range is China (Guangdong) to Hainan.

    [GB]
    Habit
    Annual. Culms prostrate; slender; 40-50 cm long; rooting from lower nodes. Leaf-sheaths 3-5 cm long; mostly shorter than adjacent culm internode; puberulous; with tubercle-based hairs. Ligule absent. Leaf-blade base broadly rounded. Leaf-blades elliptic, or ovate; 8-15 cm long; 5-10 mm wide; flaccid. Leaf-blade surface glabrous, or pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous; tuberculate-ciliate; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle; terminal and axillary; exserted, or embraced at base by subtending leaf. Peduncle 5-15 cm long. Panicle open; ovate; 15-25 cm long; 5-10 cm wide. Primary panicle branches ascending; 1-2 -nate. Panicle branches eglandular; pubescent. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.4 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.4 mm long.
    Glume
    Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 1.5 mm long; 0.8 length of spikelet; herbaceous; without keels; 3-5 -veined. Lower glume apex obtuse. Upper glume lanceolate; 1.5 mm long; 0.8 length of spikelet; herbaceous; without keels; 3-5 -veined. Upper glume apex obtuse.
    Florets
    Basal sterile florets male. Lemma of lower sterile floret oblong; 1.8 mm long; 1.5 length of fertile lemma; membranous. Fertile lemma orbicular; hemispherical; 1.2 mm long; cartilaginous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea cartilaginous.
    Flowers
    Anthers 3; 1.5 mm long; brown.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China.
    Reference
    Isachneae. Keng 1996.

    Distribution

    Native to:

    China Southeast, Hainan

    Isachne hainanensis Keng f. appears in other Kew resources:

    First published in Acta Phytotax. Sin. 10: 23 (1965)

    Accepted by

    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

    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