1. Family: Poaceae Barnhart
    1. Genus: Rostraria Trin.
      1. Rostraria rohlfsii (Asch.) Holub

        This species is accepted, and its native range is N. Central & NE. Sahara.

    [GB]
    Habit
    Annual; caespitose; clumped loosely. Culms erect, or geniculately ascending; 15-30 cm long; 2-5 -noded. Leaf-sheaths pubescent. Ligule an eciliate membrane; 0.5-1 mm long. Leaf-blades 2-10 cm long; 1.5-3 mm wide; flaccid. Leaf-blade surface pubescent. Leaf-blade apex abruptly acute; hardened.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear, or lanceolate; 3-10 cm long; 0.6-1 cm wide. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.5-1 mm long.
    Spikelets
    Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong, or obovate; laterally compressed; 4-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong, or obovate; laterally compressed; 4-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; dissimilar; reaching apex of florets; similar to fertile lemma in texture; gaping. Lower glume lanceolate; 3-3.5 mm long; 0.75 length of upper glume; membranous; without keels; 1-3 -veined. Lower glume lateral veins absent, or distinct. Lower glume surface pubescent. Lower glume apex acuminate. Upper glume elliptic; 4-5 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface glabrous. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 3-4 mm long; membranous; much thinner on margins; keeled; 3-5 -veined. Lemma midvein scabrous. Lemma surface asperulous; glabrous. Lemma apex dentate; 2 -fid; acute; awned; 1 -awned. Principal lemma awn dorsal; arising 0.8 way up back of lemma; 1-3 mm long overall. Palea gaping; hyaline. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 0.5-0.7 mm long. Ovary glabrous.
    Distribution
    Africa: north.
    Reference
    Aveneae. FTA 1993.

    Images

    Distribution

    Native to:

    Algeria, Chad, Egypt, Libya, Niger, Tunisia

    Rostraria rohlfsii (Asch.) Holub appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Ascherson, P [622], Libya K000345043

    First published in Folia Geobot. Phytotax. 9: 272 (1974)

    Accepted by

    • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Boulos, L. (2005). Flora of Egypt 4: 1-617. Al Hadara Publishing, Cairo.

    Literature

    Kew Backbone Distributions
    • Dobignard, D. & Chatelain, C. (2010). Index synonymique de la flore d'Afrique du nord 1: 1-455. Éditions des conservatoire et jardin botaniques, Genève.
    • Quézel, P. (1958). Mission Botanique au Tibesti: 1-357. Université d'Alger.

    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