1. Family: Poaceae Barnhart
    1. Genus: Rostraria Trin.
      1. Rostraria azorica S.Hend.

        This species is accepted, and its native range is Azores (Santa Maria).

    [GB]
    Habit
    Annual; caespitose. Culms erect; 2.5-18 cm long. Lateral branches lacking. Leaf-sheaths pubescent. Ligule an eciliate membrane; 0.5-1.5 mm long; lacerate; obtuse. Leaf-blades 2-11 cm long; 1.5-3 mm wide. Leaf-blade surface pubescent; densely hairy; hairy on both sides.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; oblong; 1.5-8 cm long; 0.3-0.9 cm wide. Panicle axis scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 5.5-9 mm long; 2-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent; with 0.1-0.5 mm long hairs.
    Fertile
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 5.5-9 mm long; 2-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent; with 0.1-0.5 mm long hairs.
    Glume
    Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; shiny; gaping. Lower glume elliptic; 3-6.5 mm long; 0.7 length of upper glume; membranous; 1-keeled; 2-3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume elliptic; 4-7 mm long; 0.8-1.2 length of adjacent fertile lemma; membranous; 1-keeled; 5 -veined. Upper glume primary vein scabrous. Upper glume apex acute; muticous, or mucronate.
    Florets
    Fertile lemma elliptic; 5-6 mm long; membranous; shiny; keeled; 5 -veined. Lemma surface smooth, or papillose; glabrous, or pubescent. Lemma hairs 0.5-0.75 mm long. Lemma apex emarginate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66-0.8 way up back of lemma; curved, or geniculate; 2.25-4 mm long overall; with a straight or slightly twisted column. Palea gaping; 0.75-1 length of lemma. Palea keels scaberulous. Palea apex dentate; 2 -fid; awned; awns 0.31 mm long. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 0.9-1.6 mm long. Ovary glabrous.
    Distribution
    Africa: Macaronesia.
    Reference
    Aveneae. Henderson 2005.

    Images

    Distribution

    Rostraria azorica S.Hend. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 1, 2002 Hansen, A. [92], Azores K000857894 holotype

    First published in Bot. J. Linn. Soc. 141: 126 (2003)

    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.

    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