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  1. Family: Poaceae Barnhart
    1. Genus: Rytidosperma Steud.
      1. Rytidosperma unarede (Raoul) Connor & Edgar

        This species is accepted, and its native range is Lord Howe Islands, Kermadec Islands, New Zealand.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Basal innovations extravaginal. Culms 35-85 cm long. Leaf-sheaths glabrous on surface, or pilose. Leaf-sheath oral hairs bearded; 4 mm long. Ligule a fringe of hairs; 0.2-0.8 mm long. Leaf-blades flat, or involute; 20-40 cm long; 2-3.5 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; lanceolate; 7-18 cm long. Panicle axis scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
    Spikelets
    Spikelets comprising (3-)4-6(-8) fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 7.5-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.4-0.6 mm long. Floret callus evident; 0.5-0.8 mm long; pilose.
    Fertile
    Spikelets comprising (3-)4-6(-8) fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 7.5-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.4-0.6 mm long. Floret callus evident; 0.5-0.8 mm long; pilose.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7.5-12 mm long; 1 length of upper glume; membranous; without keels; 5(-7) -veined. Lower glume apex acute. Upper glume lanceolate; 7.5-12 mm long; 1.2 length of adjacent fertile lemma; membranous; without keels; 5(-7) -veined. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 6-10 mm long; chartaceous; without keel; 9 -veined. Lemma surface with 2 transverse rows of hair tufts. Lemma apex lobed; 2 -fid; with lobes 4-7 mm long; incised 0.66 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 6-12 mm long overall; with twisted column. Column of lemma awn 1-3 mm long. Lateral lemma awns arising on apex of lobes. Palea 4-5 mm long. Palea keels ciliolate. Palea surface glabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; fleshy; ciliate. Anthers 3; 0.3-1.6 mm long.
    Fruits
    Caryopsis with adherent pericarp; 1.6-1.8 mm long.
    Distribution
    Australasia: Australia and New Zealand.
    Reference
    Arundineae. Connor & Edgar 1993.

    Images

    Distribution

    Native to:

    Chatham Is., Kermadec Is., New Zealand North, New Zealand South, Norfolk Is.

    Synonyms

    Other Data

    Rytidosperma unarede (Raoul) Connor & Edgar appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Zotov, V.D. [s.n.], New Zealand K000714296
    Zotov, V.D. [62292A], New Zealand K000714297
    Zotov, V.D. [20148], New Zealand K000714306
    Hector [11], New Zealand K000714285
    Earle, T.T. [249], New Zealand K000714288
    Sinclair [3850], New Zealand K000714286
    Sinclair [3819], New Zealand K000714287
    Monro, D. [121], New Zealand K000714281
    Kirk, T. [811], New Zealand K000714307
    s.coll. [s.n.], New Zealand K000714279
    s.coll. [s.n.], New Zealand K000714280
    s.coll. [385], New Zealand K000714282
    s.coll. [s.n.], New Zealand K000714283
    s.coll. [s.n.], New Zealand K000714284
    s.coll. [s.n.], New Zealand K000714292
    s.coll. [s.n.], New Zealand K000714293
    s.coll. [s.n.], New Zealand K000714295 Unknown type material
    s.coll. [s.n.], New Zealand K000714298
    s.coll. [s.n.], New Zealand K000714299
    s.coll. [s.n.], New Zealand K000714300
    s.coll. [s.n.], New Zealand K000714301
    s.coll. [s.n.], New Zealand K000714302
    s.coll. [s.n.], New Zealand K000714303
    s.coll. [s.n.], New Zealand K000714304
    Healy, A.J. [25168], New Zealand K000714294
    Cunning, A. [256], New Zealand K000714289
    Rooper, R. [117754], New Zealand K000714290
    Calero [s.n.], New Zealand K000714291
    Crosby-Smith, J. [s.n.], New Zealand K000714305

    Bibliography

    First published in New Zealand J. Bot. 17: 328 (1979)

    Accepted by

    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • 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.

    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.
    • 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