1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida tenuissima A.Camus

        This species is accepted, and its native range is Madagascar.

    [GB]
    Habit
    Perennial; caespitose. Culms slender; 10-50 cm long; 0.3-0.5 mm diam. Culm-internodes distally glabrous. Lateral branches lacking, or sparse. Leaf-sheaths striately veined; glabrous on surface, or pilose. Ligule a fringe of hairs. Leaf-blades filiform; convolute; 2-12 cm long; 0.5-0.8 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy; hairy adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 3-8 cm long; bearing few spikelets. Primary panicle branches 1-2 -nate; bearing 1-3 fertile spikelets on each lower branch. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 4-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; pubescent; truncate.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 4-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; pubescent; truncate.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 3-4.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4-6.5 mm long; 1-1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex truncate; mucronate.
    Florets
    Fertile lemma lanceolate; subterete; 4-5 mm long; coriaceous; mid-green, or purple; without keel; 3 -veined. Lemma surface scaberulous. Lemma margins involute; covering most of palea. Lemma apex acute; awned; 1 -awned, or 3 -awned. Principal lemma awn geniculate, or 3-branched; with 8-10 mm long limb; with twisted column; persistent. Column of lemma awn 3-4 mm long. Lateral lemma awns when present 3-5 mm long; shorter than principal. Palea 0.1 length of lemma; without keels.
    Flowers
    Anthers 3.
    Distribution
    Africa: western Indian ocean.
    Reference
    Aristideae. Gr Madag 1997.
    [GB]
    Habit
    Annual. Culms 12-20 cm long. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule absent. Leaf-blades filiform; conduplicate; 1.5-2 cm long. Leaf-blade surface glabrous, or pilose; sparsely hairy.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear; 5-6 cm long. Primary panicle branches 3-6 in number; appressed; 2-3 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 4 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 4 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 3.2 mm long; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 3.8 mm long; 0.9 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma elliptic; subterete; 4 mm long; coriaceous; without keel; 5 -veined. Lemma surface rugulose. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 12 mm long overall; with twisted column.
    Flowers
    Anthers 3; 1 mm long.
    Distribution
    Africa: western Indian ocean.
    Reference
    Stipeae. Camus 2007.

    Distribution

    Native to:

    Madagascar

    Aristida tenuissima A.Camus appears in other Kew resources:

    First published in Bull. Soc. Bot. France 79: 844 (1932 publ. 1933)

    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.
    • Bosser, J. (1969). Gramiées des pasturages et des cultures a Madagascar: 1-440. ORSTOM, Paris.

    Literature

    Kew Backbone Distributions
    • Bosser, J. (1969). Gramiées des pasturages et des cultures a Madagascar: 1-440. ORSTOM, Paris.

    Sources

    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