1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum merkeri Mez

        This species is accepted, and its native range is Kenya to Namibia.

    [GB]
    Habit
    Perennial. Rhizomes short. Culms erect, or geniculately ascending; robust; 100-175 cm long; (3-)4-6 mm diam. Culm-nodes glabrous, or bearded. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a ciliate membrane. Leaf-blades parallel-sided; 20-35 cm long; 7-15 mm wide. Leaf-blade surface hispid; hairy on both sides; with tubercle-based hairs. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; elliptic, or oblong; 25-30 cm long. Primary panicle branches ascending. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 2-2.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 2-2.5 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume oblate; 0.25-0.33 length of spikelet; membranous; without keels; 1(-3) -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 9(-11) -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; 9(-11) -veined; acute. Fertile lemma oblong; dorsally compressed; 1.5-2 mm long; indurate; pallid; shiny; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Distribution
    Africa: west-central tropical, east tropical, southern tropical, and south.
    Reference
    Paniceae. FTEA.
    [FZ]

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

    Habit
    Robust, often hispid tufted perennial with culms 100–200 cm. high.
    Leaf lamina
    Leaf laminae 20–35 cm. long and 7–15 mm. wide, flat, acuminate.
    Inflorescences
    Panicle (20)25–35 cm. long, elliptic-oblong, moderately to much branched, the branches ascending.
    Spikelets
    Spikelets (2)2.5–3 mm. long, ovate-elliptic, sharply acute; inferior glume 1/4–1/3 the length of the spikelet, ovate 1(3)-nerved; superior glume 9-nerved; inferior lemma similar to the superior glume, male.
    [FTEA]

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

    Habit
    Robust, coarsely hairy or rarely subglabrous perennial, with a short stout rhizome; culms erect or ascending, 100–175 cm. high, (3–)4–6 mm. in diameter at the base; nodes glabrous or hairy.
    Leaves
    Leaf-sheaths usually hairy with stiff tubercle-based hairs; blades linear, 20–35 cm. long, 7–15 mm. wide, straight at the base, flat, usually hairy above and below with stiff tubercle-based hairs, acuminate.
    Inflorescences
    Panicle elliptic or oblong, 25–30 cm. long, much branched, the branches ascending and naked at the base with the spikelets evenly dispersed towards the tips.
    Spikelets
    Spikelets ovate-elliptic, 2–2.5 mm. long, acute; lower glume ovate, 1/4–1/3 the length of the spikelet, membranous, 1(–3)-nerved, cuff-like, clasping, acute; upper glume ovate, as long as the spikelet, 9(–l 1)-nerved, acute; lower lemma similar to the upper glume, ♂, its palea well developed; upper lemma pale and glossy.
    Habitat
    Swamps and seasonally damp places in heavy clay soils; 90–1900 m.
    Distribution
    K1 K4 K5 T1 T2 T3 T4 T5 T6 U1

    Images

    Distribution

    Native to:

    Angola, Kenya, Malawi, Mozambique, Namibia, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

    Panicum merkeri Mez appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1934 Whyte, A. [s.n.], Malawi K000255543 isosyntype
    Welwitsch [7355], Angola K000282474 isosyntype
    Welwitsch [2833], Angola K000282475 isosyntype
    Eichinger, Tanzania K000255580

    First published in Bot. Jahrb. Syst. 34: 144 (1904)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • 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
    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • 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.
    Flora of Tropical East Africa
    • D.M. Napper, Grasses of Tanganyika: 62 (1965).
    • Jackson & Wiehe, Ann. list Nyasaland grasses: 51 (1958).
    • Mez in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 34: 144 (1904).

    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