1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum rigidum Balf.f.

        This species is accepted, and its native range is Socotra.

    [GB]
    Habit
    Perennial; caespitose. Rootstock evident. Culms decumbent; 30-60 cm long; wiry. Leaves distichous. Ligule a fringe of hairs. Leaf-blades involute; 1-3 cm long; 0.5-1 mm wide; stiff. Leaf-blade apex acute; pungent.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 1.5-4 cm long. Primary panicle branches ascending, or spreading. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; obtuse; 1.5-1.8 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; obtuse; 1.5-1.8 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; acute. Fertile lemma elliptic; dorsally compressed; 2 mm long; indurate; pallid; shiny; without keel. Lemma margins involute. Palea involute; indurate.
    Distribution
    Africa: northeast tropical.
    Reference
    Paniceae. Fl Arab 2005.

    Images

    Distribution

    Native to:

    Socotra

    Panicum rigidum Balf.f. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    s.coll. [346], Yemen K000674305
    Balfour, I. B. [130], Yemen K000674304
    Balfour, I. B. [561], Yemen K000674306

    First published in Proc. Roy. Soc. Edinburgh 12: 97 (1883)

    Accepted by

    • Cope, T.A., Knees, S.G. & Miller, A.G. (2007). Flora of the Arabian peninsula and Socotra 5(1): 1-387. Edinburgh University Press.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.

    Literature

    Kew Backbone Distributions
    • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.

    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 2019. 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 2019. 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