1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum nigromarginatum Robyns

        This species is accepted, and its native range is Uganda to Zambia.

    [GB]
    Habit
    Annual. Culms geniculately ascending; weak; 30-55 cm long. Leaf-sheaths as wide as blade at the collar, or narrower than blade at the collar. Ligule a ciliate membrane. Leaf-blades spreading, or reflexed; lanceolate; 1.5-3.5(-4.5) cm long; 1-4 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy. Leaf-blade margins glabrous, or ciliate (clavellately). Leaf-blade apex acute, or acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong, or ovate; 1-6 cm long; contracted about primary branches. Primary panicle branches bearing spikelets almost to the base. Panicle branches pilose; with clavellate hairs. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.2-1.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.2-1.5 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.33-0.5 length of spikelet; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 7 -veined; obtuse. Fertile lemma oblong; dorsally compressed; 1.2-1.5 mm long; indurate; pallid; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Distribution
    Africa: west-central tropical, east tropical, and southern tropical.
    Reference
    Paniceae. FTEA.
    [FZ]

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

    Habit
    Aquatic annual with weak culms 30–55 cm. long.
    Leaf lamina
    Leaf laminae 1.5–3.5(4.5) cm. long and 1–4 mm. wide, narrowly lanceolate, often clavellate-hairy on the margins, acute or acuminate.
    Inflorescences
    Panicle 1–6 cm. long, ovate or oblong, clavellate hairy.
    Spikelets
    Spikelets 1.2–1.5 mm. long; oblong; inferior glume ovate, 1/3–1/2 the length of the spikelet, nerveless; superior glume 7-nerved; inferior lemma 7-nerved, sterile, its palea poorly developed; superior lemma dull.
    [FTEA]

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

    Habit
    Aquatic annual; culms weak, slender, ascending, 30–55 cm. long.
    Leaves
    Leaf-blades spreading or deflexed, narrowly lanceolate, 1.5–3.5(–4.5) cm. long, 1–4 mm. wide, widened or straight at the base, membranous, glabrous or sparsely pilose, often clavellate-hairy on the margins, acute or acuminate.
    Inflorescences
    Panicle ovate or oblong, 1–6 cm. long, sparsely branched, the secondary branches often severely contracted and then the primary branches raceme-like, clavellate-hairy.
    Spikelets
    Spikelets oblong, 1.2–1.5 mm. long, glabrous; lower glume ovate, 1/3–1/2 the length of the spikelet, nerveless, bluntly acute; upper glume oblong, almost as long as the spikelet, 7-nerved, obtuse; lower lemma broadly ovate, 7-nerved, sterile, its palea poorly developed; upper lemma exposed at the tip, pale, not glossy.
    Habitat
    Swamps and marshy ground; 1140–1650 m.
    Distribution
    U4

    Images

    Distribution

    Native to:

    Uganda, Zambia, Zaïre

    Panicum nigromarginatum Robyns appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Bequaert, J. C. C [385], Congo, DRC K000256718 holotype
    Bequaert, J. C. C [385], Congo, DRC K000256717 holotype

    First published in Mém. Inst. Roy. Colon. Belge, Sect. Sci. Nat. (8vo), reimpr. 1: 24 (1932)

    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.
    • Clayton, W.D. (1989). Flora Zambesiaca 10(3): 1-231. Royal Botanic Gardens, Kew.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.

    Literature

    Kew Backbone Distributions
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.
    Flora of Tropical East Africa
    • Robyns, Fl. Agrost. Congo Belge 2: 165 (1934).
    • Robyns in Mém. Inst. Roy. Col. Belge, Sec. Sci. Nat. & Méd. 1, 6: 24, t.l/A–F (1932)

    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