1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus petiolaris (Hochst.) Morrone

        This species is accepted, and its native range is NE. Tropical Africa.

    [GB]
    Habit
    Annual. Culms erect; 45-120 cm long; compressible; with prop roots. Ligule a fringe of hairs. Leaf-blade base broadly rounded, or cordate; with a false petiole; petiole 2-12 cm long. Leaf-blades 10-25 cm long; 8-25 mm wide; flaccid. Leaf-blade surface glabrous, or puberulous. Leaf-blade margins scaberulous.
    Inflorescences
    Synflorescence compound; scanty. Inflorescence a panicle; terminal and axillary. Panicle spiciform; linear; 1.5-3 cm long. Primary panicle branches accrescent to a central axis; with lateral stumps on axis. Panicle axis scaberulous; glabrous. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; base obtuse. Involucral bristles deciduous with the fertile spikelets; in one whorl; 1 in principal whorl; 10-20 mm long; terete; flexible; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; acute; 2-3 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; acute; 2-3 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.1-0.5 mm long; 1 length of upper glume; 0.05-0.15 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume oblong; 0.1-0.5 mm long; 0.05-0.15 length of spikelet; hyaline; without keels; 0 -veined. Upper glume primary vein absent. Upper glume lateral veins absent. Upper glume apex emarginate.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 5 -veined; smooth, or scaberulous; acute. Fertile lemma elliptic; 2-3 mm long; cartilaginous; without keel; 5 -veined. Lemma surface smooth, or scaberulous. Lemma margins flat. Lemma apex acute. Palea cartilaginous.
    Distribution
    Africa: northeast tropical.
    Reference
    Paniceae. FTA 1993.

    Images

    Distribution

    Native to:

    Eritrea, Ethiopia, Sudan

    Introduced into:

    Iowa

    Cenchrus petiolaris (Hochst.) Morrone appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Schimper [94], Ethiopia Pennisetum petiolare K000281202 isotype
    Schimper [94], Ethiopia Pennisetum petiolare K000281200 isotype
    Schimper [94], Ethiopia Pennisetum petiolare K000281201 isotype
    Schimper, Ethiopia Pennisetum petiolare K000281199
    Schimper, Ethiopia Pennisetum petiolare K000281198
    Schimper [126], Ethiopia Pennisetum petiolare K000281235 isosyntype
    Lloyd, G., Sudan Pennisetum petiolare K000281236

    First published in Ann. Bot. (Oxford) 106: 128 (2010)

    Literature

    Kew Backbone Distributions
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.

    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