1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne sylvestris Ridl.

        This species is accepted, and its native range is Assam to China (Fujian, Guangdong), Peninsula Malaysia to Sumatera.

    [GB]
    Habit
    Perennial. Culms erect; 20-50 cm long. Culm-nodes pubescent. Leaf-sheaths 3-5 cm long; pilose; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs; 4 mm long. Leaf-blades lanceolate; 5-10 cm long; 7-14 mm wide; glaucous. Leaf-blade surface scaberulous; rough adaxially; pubescent; densely hairy; hairy abaxially. Leaf-blade margins cartilaginous; scaberulous.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 8-17 cm long; 3-6.5 cm wide. Primary panicle branches ascending; 3-7 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels glandular.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 2 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; 2 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 ovate; 1.8 mm long; 0.9 length of spikelet; membranous; purple; without keels; 7(-9) -veined. Lower glume surface pubescent. Lower glume apex obtuse. Upper glume ovate; 1.8 mm long; 1 length of adjacent fertile lemma; membranous; purple; without keels; 9 -veined. Upper glume surface pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret unlike other scales; ovate; 1.6 mm long; 1.3 length of fertile lemma; coriaceous; pubescent. Fertile lemma ovate; 1.2 mm long; coriaceous; without keel. Lemma surface glabrous, or puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
    Flowers
    Anthers 3; 1 mm long; yellow. Stigmas purple.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China. Asia-tropical: Malesia.
    Reference
    Isachneae. Gilliland 1993.

    Images

    Distribution

    Native to:

    Assam, Bangladesh, China Southeast, Malaya, Sumatera

    Isachne sylvestris Ridl. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jul 1, 2010 Ridley, H.N. [7265], Peninsular Malaysia K000290184 Unknown type material
    Jan 1, 2000 Keenan, R.L. [s.n.], India K000245409 lectotype
    Keenan, R.L. [s.n.], India K001056220 lectotype
    De Silva, F. [s.n.], India K000245410 lectotype

    First published in J. Straits Branch Roy. Asiat. Soc. 44: 206 (1905)

    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.
    • Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655.
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.

    Not accepted by

    • Iskandar, E.A.P. & Veldkamp, J.F. (2004). A revision of Malesian Isachne sect. Isachne (Gramineae, Panicoideae, Isachneae) Reinwardtia 12: 159-179. [Cited as Isachne albens.]

    Literature

    Kew Backbone Distributions
    • 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