1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida stenostachya Clayton

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

    [GB]
    Habit
    Perennial; caespitose. Culms 60-120 cm long. Culm-internodes distally glabrous. Ligule a fringe of hairs. Leaf-blades convolute; 20-60 cm long; 2-4 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle contracted, or spiciform; linear; continuous, or interrupted; 25-30 cm long; 1-2 cm wide. Panicle branches glabrous in axils. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 10-19 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1 mm long; pilose; obtuse.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 10-19 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1 mm long; pilose; obtuse.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 10-19 mm long; 1-1.1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex dentate; 2 -fid; acute; mucronate, or awned. Lower glume awn 0-2 mm long. Upper glume lanceolate; 10-19 mm long; 1-1.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid; mucronate, or awned; 1 -awned. Upper glume awn 0-2 mm long.
    Florets
    Fertile lemma elliptic; subterete; 10-13 mm long; coriaceous; keeled; 3 -veined. Lemma midvein without distinctive roughness, or scaberulous. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 3 -awned. Principal lemma awn 3-branched; with 20-30 mm long limb; without a column, or with a straight or slightly twisted column; persistent. Column of lemma awn 0-4 mm long. Lateral lemma awns 20-30 mm long; subequal to principal. Palea 0.2 length of lemma; without keels.
    Flowers
    Anthers 3.
    Distribution
    Africa: east tropical and southern tropical.
    Reference
    Aristideae. FTEA.
    [FZ]

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

    Habit
    Perennial, 60-130 cm. high, densely caespitose.
    Culms
    Culms erect, robust, simple, glabrous, smooth, 4 — many-noded; nodes glabrous.
    Leaf sheaths
    Leaf-sheaths longer than the internodes, gaping, glabrous, smooth.
    Ligules
    Ligule a short-ciliolate rim; auricles usually densely long-barbate; collar glabrous, shortly pubescent or barbate.
    Leaf lamina
    Leaf-laminae 20-60 x 0·2-0·5 cm., flat at the base, involute upwards, densely ribbed (all ribs of equal thickness), slightly scaberulous above, glabrous, smooth beneath, Panicle 25-40 cm. long, dense, narrow, contracted, interrupted, with a glabrous terete striate axis; branches erect, slightly angular, scaberulous, bearing spikelets nearly from the base.
    Spikelets
    Spikelets greenish or slightly tinged with purple.
    Glume
    Glumes subequal, punctulate on the sides, 1-nerved; the inferior 10-19 mm. long, acuminate, tapering into a short awn, scabrous on the keel; the superior 9-17 mm. long, 2-fid at the tip, with short obtuse lobes and a very short delicate awn from the sinus.
    Lemma
    Lemma 10-15 mm. long, subterete, sometimes with a few dark spots, glabrous and smooth in the lower part, scaberulous towards the apex, gradually tapering into a short beak up to 4 mm. long; callus 1 mm. long, narrow, obtuse, shortly barbate; awns subequal, somewhat rigid, scaberulous; the central awn up to 30 mm. long, slightly curved at the base; the lateral ones up to 25 mm. long, erect; articulation absent.
    [FTEA]

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

    Habit
    Densely caespitose perennial, 60–120 cm. high.
    Leaves
    Leaf-blades 20–60 cm. long, convolute, up to 4 mm. wide when flattened.
    Inflorescences
    Panicle contracted or spike-like, 25–30 cm. long and 1–2 cm. wide, sometimes interrupted below; branches usually glabrous in their axils.
    Spikelets
    Spikelets enclosed by the glumes; glumes subequal, 10–19 mm. long, the lower usually the longer, minutely bidentate and mucronate or with an awn-point up to 2 mm. long; lemma subterete, 10–13 mm. long, smooth or obscurely scaberulous on the mid-nerve, passing into the awn without an articulation; callus 1 mm. long, broadly linear, narrowly obtuse at the tip; awn with or without a slightly twisted column up to 4 mm. long, the branches subequal, 2–3 cm. long, rigid.
    Habitat
    Clearings and waste places in deciduous thicket and bushland; sea-level to 1400 m.
    Distribution
    K4 K7 T3 T5 T7

    Images

    Distribution

    Native to:

    Burundi, Kenya, Somalia, Tanzania, Zambia

    Aristida stenostachya Clayton appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Mar 1, 1972 Bogdan, A. [AB3371], Kenya K000386363
    May 1, 1967 Bogdan, A. [AB5322], Kenya K000386368
    May 1, 1967 Polhill, R.M. [866], Kenya K000386359
    Jan 1, 1967 Bogdan, A. [AB3328], Kenya K000386361
    Dec 1, 1966 Greenway, P.J. [9769], Kenya K000386366
    Dec 1, 1966 Burtt, B.D. [5393], Tanzania K000366782 holotype
    Dec 1, 1966 Bogdan, A. [AB4720], Kenya K000386362
    Dec 1, 1966 Wilson, G. [61], Kenya K000386367
    Dec 1, 1966 Moomaw, J.C. [1243], Kenya K000386365
    Dec 1, 1966 Pratt, D.J. [KS14], Kenya K000386369
    Drummond, R.B. [4214], Kenya K000386360
    Burtt, B.D. [5393], Tanzania K000366783 isotype
    Bidgood, S. [6170], Tanzania K000468255
    Bidgood, S. [5192], Tanzania K000190420
    Burtt, B. D. [5393], Tanzania K000366784 Unknown type material
    Leuthold, W. [122], Kenya K000386364

    First published in Bol. Soc. Argent. Bot. 12: 111 (1968)

    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.
    • Thulin, M. (ed.) (1995). Flora of Somalia 4: i-ii, 1-298. The Royal Botanic Gardens, Kew.
    • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi Lejeunia; Revue de Botanique, n.s., 132: 1-127.
    • Launert, E. (1971). Flora Zambesiaca 10(1): 1-152. Royal Botanic Gardens, Kew.
    • Clayton, W.D. (1970). Gramineae Flora of Tropical East Africa 1: 1-176.

    Literature

    Kew Backbone Distributions
    • Thulin, M. (ed.) (1995). Flora of Somalia 4: i-ii, 1-298. The Royal Botanic Gardens, Kew.
    • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi Lejeunia; Revue de Botanique, n.s., 132: 1-127.
    • Clayton, W.D. (1970). Gramineae Flora of Tropical East Africa 1: 1-176.
    Flora of Tropical East Africa
    • W. D. Clayton in Bol. Soc. Arg. Bot. 12: 111 (1968).

    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 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