1. Family: Poaceae Barnhart
    1. Genus: Tetrarrhena R.Br.
      1. Tetrarrhena acuminata R.Br.

        This species is accepted, and its native range is SE. Australia.

    [GB]
    Habit
    Perennial. Stolons present. Culms erect, or geniculately ascending; slender; 6-60 cm long. Ligule an eciliate membrane; 0.5 mm long; erose. Leaf-blades 1-12 cm long; 1-4 mm wide.
    Inflorescences
    Inflorescence composed of racemes, or comprising only a few spikelets. Racemes 1; single; unilateral; 2-5 cm long; bearing few fertile spikelets; bearing 2-10 fertile spikelets on each. Rhachis angular. Spikelet packing contiguous, or lax. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.6 mm long; 0.33 length of upper glume; hyaline; without keels. Lower glume apex obtuse. Upper glume ovate; 1.7 mm long; 0.15-0.25 length of spikelet; hyaline; without keels. Upper glume apex obtuse.
    Florets
    Basal sterile florets dissimilar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 5-8 mm long; 0.75 length of spikelet; coriaceous; 1-keeled; 5 -veined; ribbed; scabrous; rough on veins; acute; mucronate. Lemma of upper sterile floret oblong; 6-10 mm long; 1.3 length of lower sterile floret; coriaceous; scabrous and ribbed; obtuse. Fertile lemma elliptic; 5-7 mm long; coriaceous; keeled; 7-9 -veined. Lemma lateral veins obscure. Lemma apex obtuse.
    Flowers
    Lodicules 2; membranous. Anthers 4; 2.5 mm long.
    Distribution
    Australasia: Australia.
    Reference
    Ehrharteae. WDC 1997.

    Images

    Distribution

    Native to:

    New South Wales, South Australia, Tasmania, Victoria

    Tetrarrhena acuminata R.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Brown, R. [6167], Tasmania Ehrharta acuminata K000587402 Unknown type material

    First published in Prodr. Fl. Nov. Holland.: 210 (1810)

    Not 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. [Cited as Ehrharta acuminata.]

    Literature

    Kew Backbone Distributions
    • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.

    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