1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida hygrometrica R.Br.

        This species is accepted, and its native range is N. Australia.

    [GB]
    Habit
    Annual; caespitose; clumped loosely. Culms erect, or geniculately ascending; 29-84 cm long. Culm-internodes smooth; distally glabrous. Lateral branches lacking, or sparse. Leaf-sheaths smooth; glabrous on surface, or pilose. Leaf-sheath oral hairs ciliate; 1-2 mm long. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades curled, or flexuous; filiform; involute; 11-27 cm long; 0.8-1.2 mm wide. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; elliptic; 14.4-35 cm long; 7-15 cm wide. Primary panicle branches 2 -nate; 2-3.5 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 25-43 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 4-6 mm long; pubescent; pungent. Floret callus hairs 0.4-1.3 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 25-43 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 4-6 mm long; pubescent; pungent. Floret callus hairs 0.4-1.3 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 13.5-23 mm long; 0.5-0.6 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex emarginate, or obtuse. Upper glume lanceolate; 25-42.6 mm long; 2.5-3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex emarginate; mucronate, or awned; 1 -awned. Upper glume awn 0.5-3.5 mm long.
    Florets
    Fertile lemma lanceolate; subterete; 8-16 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 3 -awned. Principal lemma awn 3-branched; flat below; with 85-150 mm long limb; with twisted column; deciduous; abscissing from top of lemma. Column of lemma awn 53-85 mm long. Lateral lemma awns 81-140 mm long; subequal to principal. Palea 0.2 length of lemma; without keels.
    Flowers
    Anthers 3; 2 mm long.
    Fruits
    Caryopsis with adherent pericarp; 6.6-8.5 mm long. Hilum linear; 0.33 length of caryopsis.
    Distribution
    Australasia: Australia.
    Reference
    Aristideae. Simon 1993.

    Images

    Distribution

    Native to:

    Northern Territory, Queensland, Western Australia

    Aristida hygrometrica R.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Brown, R. [6196], Australia K000859997

    First published in Prodr. Fl. Nov. Holland.: 174 (1810)

    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.
    • Mallett, K. (ed.) (2005). Flora of Australia 44B: 1-486. Australian Government Publishing Service, Canberra.

    Literature

    Kew Backbone Distributions
    • Mallett, K. (ed.) (2005). Flora of Australia 44B: 1-486. Australian Government Publishing Service, Canberra.

    Sources

    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