1. Family: Poaceae Barnhart
    1. Genus: Pseudopogonatherum A.Camus
      1. Pseudopogonatherum irritans (R.Br.) A.Camus

        This species is accepted, and its native range is Indo-China to N. Australia.

    [GB]
    Habit
    Annual. Culms erect; 60-100 cm long; 6-8 -noded. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades filiform; involute; 25-50 cm long; 1 mm wide; glaucous. Leaf-blade surface pubescent; hairy adaxially. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence composed of racemes. Racemes numerous; digitate; erect, or ascending; 3-5 cm long. Central inflorescence axis 1-3 cm long. Rhachis tough, or fragile at the nodes; 0.4 mm wide; ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse. Spikelets in pairs. Fertile spikelets sessile and pedicelled, or pedicelled (when tough); 2 in the cluster. Pedicels linear; angular; 1-2.5 mm long; ciliate.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5-3 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus 1 mm long; bearded; base acute; attached obliquely. Spikelet callus hairs 1-1.5 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5-3 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus 1 mm long; bearded; base acute; attached obliquely. Spikelet callus hairs 1-1.5 mm long.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; chartaceous; 2-keeled; keeled above; 2 -veined. Lower glume surface convex, or flat; pilose. Lower glume hairs white. Lower glume apex dentate; 2 -fid. Upper glume oblong; 1 length of spikelet; 1-keeled; 1-3 -veined. Upper glume lateral veins absent, or obscure. Upper glume surface pilose. Upper glume hairs white. Upper glume awned; 1 -awned. Upper glume awn 5-7 mm long.
    Florets
    Basal sterile florets with vestigial lower floret. Fertile lemma oblong; hyaline; without keel. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 30-50 mm long overall; with twisted column. Column of lemma awn ciliate; with 1.5-2 mm long hairs. Palea absent or minute.
    Flowers
    Anthers 3; 1 mm long.
    Distribution
    Asia-tropical: Indo-China, Malesia, and Papuasia. Australasia: Australia.
    Reference
    Andropogoneae. Reeder 1993.

    Images

    Distribution

    Native to:

    Myanmar, New Guinea, Northern Territory, Philippines, Queensland, Thailand, Western Australia

    Pseudopogonatherum irritans (R.Br.) A.Camus appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Larsen, K. [8171], Thailand Eulalia irritans K000688510
    van Beusekom, C.F. [2290], Thailand Eulalia irritans K000688509
    Lazarides, M. [7443], Thailand Eulalia irritans K000688508
    Hosseus, C.C. [143], Thailand Eulalia irritans K000688507
    Brown, R. [6187], Australia Eulalia irritans K000943475

    First published in Ann. Soc. Linn. Lyon, n.s., 68: 205 (1922)

    Not 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. [Cited as Eulalia irritans.]

    Literature

    Kew Backbone Distributions
    • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
    • Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.

    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 2019. 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 2019. 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