1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus trisetus (Leeke) Morrone

        This species is accepted, and its native range is Ethiopia to Zimbabwe.

    [GB]
    Habit
    Perennial. Culms 100-300 cm long. Ligule a fringe of hairs. Leaf-blades 15-45 cm long; 3-18 mm wide; glaucous.
    Inflorescences
    Synflorescence compound; scanty. Inflorescence a panicle; terminal and axillary. Panicle spiciform; linear; 2-7 cm long; 0.4 cm wide. Primary panicle branches accrescent to a central axis; with lateral stumps on axis. Panicle axis with rounded ribs; scaberulous; glabrous, or pubescent; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; oblong; 0.5-3 mm long; base truncate. Involucral bristles deciduous with the fertile spikelets; few; 2-6(-15) in principal whorl; with one conspicuously longer bristle; 3-15 mm long; terete; flexible; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.8-4(-5) mm long; falling entire; deciduous with accessory branch structures.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.8-4(-5) mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.5 mm long; 0.1-0.2 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate, or obtuse, or acute. Upper glume elliptic; 0.8-1.5 mm long; 0.33 length of spikelet; membranous; without keels; 1-3 -veined. Upper glume apex obtuse, or acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 5-7 -veined; scaberulous; acute. Fertile lemma elliptic; 2.8-5 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous. Lemma margins flat. Lemma apex acute. Palea membranous.
    Flowers
    Lodicules absent. Anthers 3; anther tip smooth.
    Distribution
    Africa: west-central tropical, northeast tropical, east tropical, and southern tropical.
    Reference
    Paniceae. FTEA.
    [FZ]

    Gramineae, W. D. Clayton. Flora Zambesiaca 10:3. 1989

    Habit
    Perennial.
    Culms
    Culms 1–3 m. high.
    Leaf lamina
    Leaf laminae 3–18 mm. wide, broadly linear.
    Inflorescences
    Panicles 2–7 cm. long, slender, axillary and gathered into a scanty false inflorescence; rhachis with rounded ribs and distinct peduncle stumps, scaberulous to puberulous; involucre of 2–5(15) bristles around a single spikelet; bristles glabrous, the longest 3–15 mm., the others nearly always shorter than spikelet and often obscure.
    Spikelets
    Spikelets 2.8–4(5) mm. long.
    Glume
    Inferior glume c. 0.5 mm. long, truncate to subacute; superior glume 0.8–1.5 mm. long, usually acute, rarely obtuse.
    Lemma
    Lemmas as long as spikelet, membranous.
    [FTEA]

    Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

    Habit
    Perennial; culms 1–3 m. high.
    Leaves
    Leaf-blades broadly linear, 15–45 cm. long, 3–18 mm. wide, glaucous.
    Inflorescences
    Panicles axillary, slender, 2–7 cm. long, gathered into a scanty false panicle; rhachis with rounded ribs and distinct peduncle-stumps, scaberulous to puberulous; involucre of 2–5(–15) bristles, truncate at the base; bristles glabrous, the longest 3–15 mm., the others nearly always shorter than the spikelet and often obscure.
    Spikelets
    Spikelets lanceolate, 2.8–4(–5) mm. long; lower glume ± 0.5 mm. long, truncate to subacute; upper glume 0.8–1.5 mm. long, usually acute, rarely obtuse; lemmas as long as the spikelet, membranous, scaberulous, the lower barren.
    Habitat
    Glades and clearings in upland evergreen forest; 1000–2800 m.
    Distribution
    K3 K5 K6 T6 U3

    Images

    Distribution

    Native to:

    Ethiopia, Kenya, Rwanda, Tanzania, Uganda, Zaïre, Zimbabwe

    Cenchrus trisetus (Leeke) Morrone appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Mar 1, 1976 Schimper [1411], Ethiopia Pennisetum trisetum K000281130 isotype
    Schlieben, H.J. [2121], Tanzania Pennisetum trisetum K000281227 isotype

    First published in Ann. Bot. (Oxford) 106: 130 (2010)

    Literature

    Kew Backbone Distributions
    • 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.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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