1. Family: Poaceae Barnhart
    1. Genus: Microstegium Nees
      1. Microstegium geniculatum (Hayata) Honda

        This species is accepted, and its native range is SE. China to Taiwan and N. Sumatera, N. Borneo.

    [GB]
    Habit
    Annual; mat forming. Culms rambling; 70-150 cm long; rooting from lower nodes. Culm-nodes pubescent. Leaf-sheaths 7.5-15 cm long; glabrous on surface. Ligule an eciliate membrane; 1.6 mm long. Leaf-blades linear, or lanceolate; 10-22 cm long; 6-12 mm wide. Leaf-blade surface puberulous; hairy on both sides. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 3-10; digitate; 8-17 cm long. Rhachis fragile at the nodes; flattened; smooth on surface, or scabrous on surface; scaberulous on margins; glabrous on margins. Spikelet packing lax. Rhachis internodes linear; 6-7 mm long. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; flattened; 3 mm long; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4.8 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base obtuse; attached transversely.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4.8 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base obtuse; attached transversely.
    Glume
    Glumes dissimilar; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; coriaceous; 2-keeled; keeled obtusely; 4 -veined. Lower glume primary vein scabrous. Lower glume surface concave; glabrous. Lower glume apex acute. Upper glume elliptic; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute; awned; 1 -awned. Upper glume awn 1.4 mm long.
    Florets
    Basal sterile florets with vestigial lower floret. Fertile lemma oblong; 0.6 mm long; hyaline; without keel; 3 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 48 mm long overall; with twisted column. Palea 1.6 mm long; hyaline.
    Flowers
    Anthers 3; 2 mm long.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: eastern Asia. Asia-tropical: Malesia.
    Reference
    Andropogoneae. Gilliland 1993.

    Images

    Distribution

    Native to:

    Borneo, China Southeast, Hainan, Malaya, Sumatera, Taiwan, Vietnam

    Microstegium geniculatum (Hayata) Honda appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Henderson, R. [17940], Peninsular Malaysia K000290132 holotype

    First published in J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 3: 410 (1930)

    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.
    • 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.

    Literature

    Kew Backbone Distributions
    • Chen, C.H., Veldkamp, J.-F. & Kuoh, C.S. (2012). Taxonomic revision of Microstegium s.str. (Andropogoneae, Poaceae) Blumea 57: 160-189.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • 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 2018. 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 2018. 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