1. Family: Poaceae Barnhart
    1. Genus: Dichelachne Endl.
      1. Dichelachne micrantha (Cav.) Domin

        This species is accepted, and its native range is E. & S. Australia, Norfolk Island, NW. New Zealand, Kermadec Islands, Rapa-iti, Easter Island.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 60-110 cm long; wiry. Culm-internodes smooth, or scaberulous; distally glabrous. Lateral branches lacking. Ligule an eciliate membrane; 0.3-1(-1.5) mm long. Leaf-blades 10-23 cm long; 2-5 mm wide.
    Inflorescences
    Inflorescence a panicle. Peduncle 20-45 cm long. Panicle contracted; linear; continuous, or interrupted; 10-19 cm long; 2-3.5 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; laterally compressed; 3-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.2-0.5 mm long; pubescent. Floret callus hairs 0.35-0.75 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; laterally compressed; 3-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.2-0.5 mm long; pubescent. Floret callus hairs 0.35-0.75 mm long.
    Glume
    Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 3-5 mm long; 1 length of upper glume; membranous; 1-keeled; keeled above; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 3-5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 2.75-4.5 mm long; cartilaginous; keeled; lightly keeled; 5 -veined. Lemma surface asperulous. Lemma margins involute. Lemma apex obtuse (easily splitting); awned; 1 -awned. Principal lemma awn dorsal; arising 0.75 way up back of lemma (0.5-1mm below apex); flexuous; 10-17 mm long overall; 3.5-5 length of lemma. Palea 0.25-3 mm long; 0.75 length of lemma; 2 -veined. Palea keels approximate.
    Flowers
    Lodicules 2; 0.2-0.6 mm long; glabrous, or ciliate. Anthers 1, or 3; 1-1.75 mm long; pallid, or yellow, or purple.
    Fruits
    Caryopsis with adherent pericarp; sulcate on hilar side; 2.25-4.45 mm long; apex rostrate. Hilum punctiform. Endosperm liquid.
    Distribution
    Australasia: Australia and New Zealand. Pacific: south-central and north-central.
    Reference
    Aveneae. Veldkamp.
    [GB]
    Habit
    Perennial; caespitose. Culms erect; 40-70 cm long. Lateral branches lacking. Ligule an eciliate membrane; 0.8-1.4 mm long. Leaf-blades 7-14 cm long; 1.5-3 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 4-11 cm long; 0.5-1 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; 0.2-0.3 mm long; pubescent. Floret callus hairs 0.4 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; 0.2-0.3 mm long; pubescent. Floret callus hairs 0.4 mm long.
    Glume
    Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 3.4 mm long; 0.9 length of upper glume; membranous; 1-keeled; keeled above; 1 -veined. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 3.8-4 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 1 -veined. Upper glume lateral veins absent. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma elliptic; 3-3.5 mm long; cartilaginous; keeled; lightly keeled; 5 -veined. Lemma margins involute. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn subapical, or dorsal; arising 0.75-0.9 way up back of lemma; geniculate; 5-8 mm long overall; with a straight or slightly twisted column. Palea 2.4-2.6 mm long.
    Flowers
    Anthers 3; 0.4-0.5 mm long.
    Fruits
    Caryopsis with adherent pericarp; 2.8-3.2 mm long.
    Distribution
    Australasia: Australia.
    Reference
    Aveneae. Fl Australia 2010.

    Images

    Distribution

    Native to:

    Easter Is., Kermadec Is., New South Wales, New Zealand North, Norfolk Is., Queensland, South Australia, Tasmania, Tubuai Is., Victoria, Western Australia

    Introduced into:

    Hawaii

    Dichelachne micrantha (Cav.) Domin appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Brown, R. [6211], New South Wales K000913399
    Brown, R. [6211], New South Wales K000913400 Unknown type material
    Bauer, F.L. [s.n.] K000913633 Unknown type material
    Sieber, F.W. [70], Australia K000913429 Unknown type material
    Jun 12, 2018 Gunn [1478], Tasmania Dichelachne sciurea K000356726

    First published in Biblioth. Bot. 20(85): 353 (1915)

    Accepted by

    • Snow, N. & Davidse, G. (2011). Notes on grasses (Poaceae) in Hawai'i: 3 Bishop Museum Occasional Papers 110: 17-22.
    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Orchard, A.E. (ed.) (1994). Oceanic Islands 1 Flora of Australia 49: 1-681. Australian Government Publishing Service, Canberra.
    • Zizka, G. (1991). Flowering plants of Easter island Palmarum Hortus Francofurtensis 3: 1-108.

    Literature

    Kew Backbone Distributions
    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
    • Orchard, A.E. (ed.) (1994). Oceanic Islands 1 Flora of Australia 49: 1-681. 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