1. Family: Poaceae Barnhart
    1. Genus: Richardsiella Elffers & Kenn.-O'Byrne
      1. Richardsiella eruciformis Elffers & Kenn.-O'Byrne

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

    [GB]
    Habit
    Annual; culms solitary, or caespitose. Culms 7-18 cm long; 0.2-0.5 mm diam. Leaves mostly basal. Ligule a fringe of hairs. Leaf-blades 1-6.5 cm long; 0.5-1.5 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Racemes 3-11; borne along a central axis; spreading; arcuate; unilateral; 0.5-1.2 cm long. Central inflorescence axis 1-7 cm long; tip filiform. Rhachis flattened; ciliate on margins; terminating in a barren extension; extension bristle-like. Spikelets spreading; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 6-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 1.6-2 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus bearded.
    Fertile
    Spikelets comprising 6-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 1.6-2 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus bearded.
    Glume
    Glumes deciduous; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1.2-1.4 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; mucronate. Upper glume lanceolate; 1.5-2 mm long; 1.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein tuberculate; ciliate. Upper glume lateral veins absent. Upper glume apex acuminate; mucronate.
    Florets
    Fertile lemma elliptic; 1-1.3 mm long; hyaline; keeled; keeled above; 1 -veined. Lemma margins ciliate. Lemma apex obtuse; mucronate. Palea 1 length of lemma; 2 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2. Anthers 2; 0.25-0.4 mm long.
    Fruits
    Caryopsis with free soft pericarp; 0.3-0.4 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.
    Distribution
    Africa: west-central tropical and southern tropical.
    Reference
    Eragrostideae. WDC.
    [FZ]

    Gramineae, T. Cope. Flora Zambesiaca 10:2. 1999

    Habit
    Delicate annual; culms up to 18(40) cm tall, erect, stiff; leaf laminas 1–6.5 cm × 1–1.5 mm, flat or involute on drying.
    Inflorescences
    Inflorescence 3–11 cm long, purplish or greyish, the terminal bristle up to 3 cm long; racemes 3–11, 5–15 mm long, erect or ascending, ± their own length apart or less, markedly incurved and distichously arranged on the axis in the form of a sinusoid curve, the terminal bristle 1–6 mm long.
    Spikelets
    Spikelets 1.6–2 mm long; glumes lanceolate to narrowly ovate, the inferior 1.2–1.4 mm long (including the short awn-point), with just 1 or 2 tubercle-based bristles on the keel, the superior 1.5–2 mm long, with an awn up to c. 1 mm long, and with numerous tubercle-based bristles up to 0.8 mm long; lemma 1–1.3 mm long, elliptic to ovate.

    Images

    Distribution

    Native to:

    Zambia, Zaïre

    Richardsiella eruciformis Elffers & Kenn.-O'Byrne appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Richards, H. M. [5380], Zambia K000365675 holotype
    Richards, H. M. [5380], Zambia K000365676 isotype

    First published in Kew Bull. 12: 456 (1957 publ. 1958)

    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.
    • Cope, T. (1999). Flora Zambesiaca 10(2): 1-261. Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Cope, T. (1999). Flora Zambesiaca 10(2): 1-261. Royal Botanic Gardens, Kew.

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    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 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