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  1. Family: Poaceae Barnhart
    1. Megastachya P.Beauv.

      1. This genus is accepted, and its native range is Tropical & S. Africa, Madagascar.

    [FTEA]

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

    Spikelets
    Spikelets 8–20-flowered, laterally compressed, breaking up between the florets at maturity; florets glabrous, hermaphrodite, all alike except for 2–3 at the tip of the spikelet, which are smaller but otherwise resemble the rest; lemmas 5(–7)-nerved, awnless; stamens 3.
    [GB]

    nonem

    Habit
    Annual. Culms erect, or decumbent; 40-95-170 cm long; rooting from lower nodes (1/1). Ligule an eciliate membrane. Leaf-blades lanceolate. Leaf-blade venation with distinct cross veins.
    Inflorescences
    Inflorescence a panicle. Panicle open. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
    Spikelets
    Spikelets comprising 8-14 fertile florets, or 15-20 fertile florets (1); with diminished florets at the apex. Spikelets oblong; laterally compressed; 5-10.25-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 8-14 fertile florets, or 15-20 fertile florets (1); with diminished florets at the apex. Spikelets oblong; laterally compressed; 5-10.25-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent (1), or deciduous (1); shorter than spikelet. Lower glume ovate; 0.75-0.775-0.8 length of upper glume; chartaceous; 1-keeled; 3 -veined. Lower glume apex obtuse; muticous, or mucronate. Upper glume ovate; 0.8 length of adjacent fertile lemma; chartaceous; 1-keeled; 3 -veined. Upper glume apex obtuse; muticous, or mucronate.
    Florets
    Fertile lemma elliptic; chartaceous; of similar consistency on margins (1), or much thinner on margins (1); keeled; 7 -veined. Lemma midvein scaberulous. Lemma apex emarginate, or obtuse (1); muticous, or mucronate (1). Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2. Anthers 3. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; trigonous (1/1). Embryo 0.3 length of caryopsis. Hilum punctiform (1/1).
    Distribution
    Africa.
    [FZ]

    Gramineae, E. Launert. Flora Zambesiaca 10:1. 1971

    Corolla
    The keels scabrous or shortly and stiffly ciliolate.
    Lodicules
    Lodicules very minute, cuneate, apex obliquely truncate.
    Stamens
    Stamens 2 or 3.
    Pistil
    Ovary glabrous; styles distinct; stigmas plumose.
    Fruits
    Caryopsis elliptic in outline, regularly triangular in cross-section, subacute at both ends, black when mature; embryo ± 1/3 the length of the caryopsis, invisible; hilum very minute, basal.
    Habit
    Annual or short lived perennial.
    Ligules
    Ligule a short membrane.
    Leaf lamina
    Leaf-laminae with tessellate nervation.
    Inflorescences
    Inflorescences open or (rarely) somewhat contracted panicles. Rhachilla easily disarticulating above the glumes and between the florets.
    Spikelets
    Spikelets pedicelled, solitary, 8-18(31)-flowered, laterally compressed, loosely imbricate.
    Florets
    Florets all fertile and hermaphrodite except for the terminal one which is usually reduced.
    Glume
    Glumes slightly unequal, both shorter than the following floret, 3-(rarely 5) nerved, subpersistent, chartaceous, the middle nerve sometimes excurrent into a short awn, keeled, glabrous and smooth except for the keels which are scaberulous towards the apex.
    Lemma
    Lemmas 7-nerved, chartaceous, with the apex shortly 2-fid or rarely entire and the middle nerve running out into a short mucro between the lobes, glabrous, scaberulous along the keel, otherwise smooth or very rarely the flanks somewhat asperous towards the apex; the lateral nerves equally distant, evanescent below the apex, rather inconspicuous in reflected light.
    Palea
    Paleas almost as long as the corresponding lemmas, sometime protruding, 2-keeled, membranous, apex truncate or shortly emarginate, the inflexed margins very narrow.

    Images

    Distribution

    Native to:

    Angola, Benin, Cameroon, Central African Repu, Congo, Gabon, Ghana, Guinea, Gulf of Guinea Is., Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Madagascar, Malawi, Mozambique, Nigeria, Sierra Leone, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

    Accepted Species

    Other Data

    Megastachya P.Beauv. appears in other Kew resources:

    Bibliography

    First published in Ess. Agrostogr.: 74 (1812)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of West Tropical Africa

    • Ess. Agrost. 74 (1812).

    Flora Zambesiaca

    • Agrost.: 74 (1812).

    Flora of Tropical East Africa

    • Ess. Agrost.: 74 (1812)

    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

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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