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

        This species is accepted, and its native range is SE. China to Indo-China and NW. Pacific.

    [GB]
    Habit
    Perennial; caespitose. Culms geniculately ascending, or decumbent; 10-45 cm long; wiry. Culm-internodes ridged. Lateral branches ample. Leaf-sheaths 0.5-0.8 cm long; pilose; with tubercle-based hairs. Ligule a fringe of hairs, or absent. Leaf-blade base cordate, or amplexicaul. Leaf-blades ovate; 1.5-2.5 cm long; 3-7 mm wide; stiff; glaucous. Leaf-blade margins cartilaginous; ciliate; hairy at base. Leaf-blade apex acute, or acuminate.
    Inflorescences
    Inflorescence a panicle; comprising 50-70 fertile spikelets. Panicle open; ovate; 2-3 cm long; 2.5 cm wide. Primary panicle branches spreading. Panicle branches stiff; flexuous; secund. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume oblong; 1 mm long; 1 length of spikelet; membranous; without keels; 5(-7) -veined. Lower glume surface pubescent. Lower glume apex obtuse. Upper glume oblong; 1 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 5(-7) -veined. Upper glume surface pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret similar to fertile lemma; ovate; 1 mm long; 1 length of fertile lemma; coriaceous. Fertile florets female. Fertile lemma orbicular; 1 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
    Flowers
    Anthers 3; 0.6 mm long; yellow.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China. Asia-tropical: Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: northwestern.
    Reference
    Isachneae. Gilliland 1993.

    Images

    Distribution

    Native to:

    Borneo, Cambodia, Caroline Is., China Southeast, Jawa, Malaya, Myanmar, New Guinea, Nicobar Is., Northern Territory, Queensland, Sulawesi, Sumatera, Thailand, Vietnam

    Isachne confusa Ohwi appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Kerr, A.F.G. [13708], Thailand K000621257
    Kerr, A.F.G. [14778], Thailand K000621258
    Kerr, A.F.G. [14778], Thailand K000621259
    Kerr, A.F.G. [19043], Thailand K000621260
    Put [1585], Thailand K000621261
    Put [1585], Thailand K000621262
    Glassman, S.F. [2888], Caroline Is. K001056194 isotype
    Niyomdham [1556], Thailand K000688429

    First published in Bull. Tokyo Sci. Mus. 18: 14 (1947)

    Accepted by

    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Pandey, R.P. & Dilwakar, P.G. (2008). An integrated check-list flora of Andaman and Nicobar islands, India Journal of Economic and Taxonomic Botany 32: 403-500.
    • 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.
    • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
    • Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.
    • 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
    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.

    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