1. Family: Poaceae Barnhart
    1. Genus: Rostraria Trin.
      1. Rostraria trachyantha (Phil.) Soreng

        This species is accepted, and its native range is Peru to N. & Central Chile.

    [GB]
    Habit
    Annual; caespitose; clumped loosely. Culms erect; 20-70 cm long. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2-3 mm long. Leaf-blades 3-6 mm wide. Leaf-blade surface glabrous.
    Inflorescences
    Inflorescence a panicle. Peduncle glabrous. Panicle spiciform; linear, or oblong; interrupted; loose; 6-7 cm long. Panicle axis pilose. Panicle branches pilose. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
    Fertile
    Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
    Glume
    Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; shiny; gaping. Lower glume lanceolate; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume oblong; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma oblong; 3-4 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate. Lemma surface pubescent; with tubercle-based hairs. Lemma apex truncate; awned; 1 -awned. Principal lemma awn subapical; 1.5-2 mm long overall. Palea gaping.
    Flowers
    Lodicules 2; membranous. Anthers 3. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: western South America.
    Reference
    Aveneae. Domin 1995.

    Images

    Distribution

    Native to:

    Chile Central, Chile North, Peru

    Rostraria trachyantha (Phil.) Soreng appears in other Kew resources:

    First published in Contr. U.S. Natl. Herb. 48: 604 (2003)

    Accepted by

    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/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

    Kew Science Photographs
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/