1. Family: Poaceae Barnhart
    1. Genus: Sorghum Moench
      1. Sorghum ecarinatum Lazarides

        This species is accepted, and its native range is N. Western Australia to N. Northern Territory.

    [GB]
    Habit
    Annual. Butt sheaths glabrous, or pubescent. Culms 120-220 cm long; 2.3-6 mm diam.; without nodal roots, or with prop roots. Culm-internodes glaucous; distally pruinose, or glabrous. Culm-nodes glabrous, or pubescent. Lateral branches lacking, or sparse. Ligule an eciliate membrane; 2.5-5.8 mm long; glabrous on abaxial surface, or pubescent on abaxial surface. Leaf-blades 5-9 mm wide. Leaf-blade surface glabrous, or pilose, or hispid; with tubercle-based hairs.
    Inflorescences
    Inflorescence a panicle with branches tipped by a raceme. Panicle open; dense, or loose; 15-30 cm long; 2-5 cm wide. Primary panicle branches 1-12 -nate; simple, or sparsely divided; 2.8-6.5 cm long. Panicle axis smooth. Panicle branches scabrous; rough distally; with scattered hairs, or pilose; hairy at tip; glabrous in axils, or pubescent in axils. Racemes bearing a triad of spikelets, or few fertile spikelets; 1 fertile spikelets on each. Rhachis evident, or obsolete; tough (obsolete), or fragile at the nodes (below fertile spikelet); ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse. Spikelets in pairs, or in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels filiform; flattened; 5.5-6 mm long; ciliate; with tawny hairs; with 3-3.3 mm long hairs.
    Spikelets
    Basal sterile spikelets absent, or well-developed; 2 in number, or 4 in number; sessile and pedicelled; barren. Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; dorsally compressed; 8-10 mm long; shorter than fertile; separately deciduous. Companion sterile spikelet glumes membranous; 8 -veined; glabrous, or pubescent; eciliate on margins, or ciliate on margins; acuminate; muticous. Companion sterile spikelet lemmas enclosed by glumes. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or obovate; dorsally compressed; 9.5-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 3-4 mm long; base pungent.
    Sterile
    Basal sterile spikelets absent, or well-developed; 2 in number, or 4 in number; sessile and pedicelled; barren. Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; dorsally compressed; 8-10 mm long; shorter than fertile; separately deciduous. Companion sterile spikelet glumes membranous; 8 -veined; glabrous, or pubescent; eciliate on margins, or ciliate on margins; acuminate; muticous. Companion sterile spikelet lemmas enclosed by glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or obovate; dorsally compressed; 9.5-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 3-4 mm long; base pungent.
    Glume
    Glumes dissimilar; with lower wider than upper; exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; 1 length of spikelet; coriaceous; much thinner above; dark brown, or black; without keels; keel-less throughout; 7 -veined. Lower glume lateral veins without connecting veins. Lower glume surface pubescent, or pilose. Lower glume apex obtuse. Upper glume ovate; coriaceous; much thinner above; dark brown, or black; without keels. Upper glume surface glabrous, or pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; hyaline; 2 -veined; acute. Fertile lemma oblong; hyaline; 1 -veined. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 50-100 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.
    Flowers
    Lodicules 2; oblong; 0.6-0.7 mm long; fleshy; glabrous, or ciliate; hairy on the corners. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp; obovoid; 4.5-5 mm long; obtuse.
    Distribution
    Australasia: Australia.
    Reference
    Andropogoneae. Lazarides 1993.

    Images

    Distribution

    Native to:

    Northern Territory, Western Australia

    Sorghum ecarinatum Lazarides appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jun 1, 2000 Fryxell, P.A. [3913], Western Australia K000898784 isotype

    First published in Austral. Syst. Bot. 4: 611 (1991)

    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.

    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