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

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

    [GB]
    Habit
    Annual. Culms robust, or of moderate stature; 100-400 cm long; 4-8 mm diam.; 6-8 -noded; without nodal roots, or with prop roots. Culm-internodes distally pruinose. Culm-nodes pubescent, or bearded. Lateral branches lacking, or sparse. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; 1.7-3.3 mm long. Leaf-blades 10-18 mm wide. Leaf-blade surface glabrous, or hispid; with tubercle-based hairs.
    Inflorescences
    Inflorescence a panicle with branches tipped by a raceme. Panicle open; dense; 11-28 cm long. Primary panicle branches 1-15 -nate; simple, or sparsely divided; 3-7 cm long. Panicle axis smooth, or scaberulous. Panicle branches apically expanded; pubescent in axils. Racemes 1.4-1.8 cm long; bearing a triad of spikelets, or few fertile spikelets; bearing 1(-2) fertile spikelets on each. Rhachis evident, or obsolete; fragile at the nodes; ciliate on margins. Rhachis internodes linear. Rhachis internode tip oblique. Spikelets in pairs, or in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster, or 2 in the cluster. Pedicels filiform; flattened; 6-7 mm long; ciliate.
    Sterile
    Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; dorsally compressed; 8.5-10 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 7-9 -veined; puberulous; muticous. Companion sterile spikelet lemmas enclosed by glumes; 8.5-10 mm long.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; 7.3-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; curved; 1-1.5 mm long; base pungent. Companion sterile spikelets well-developed; containing empty lemmas, or male; lanceolate; dorsally compressed; 8.5-10 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 7-9 -veined; puberulous; muticous. Companion sterile spikelet lemmas enclosed by glumes; 8.5-10 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; 7.3-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; curved; 1-1.5 mm long; base pungent.
    Glume
    Glumes dissimilar; with lower wider than upper; exceeding apex of florets; firmer than fertile lemma; dull, or shiny. Lower glume ovate; 1 length of spikelet; cartilaginous; much thinner above; without keels; keel-less except near apex; 7-9 -veined. Lower glume lateral veins with cross-veins. Lower glume surface glabrous, or pilose. Lower glume hairs dark brown; 3-4 mm long. Upper glume ovate; cartilaginous; much thinner above; without keels; 7 -veined. Upper glume surface glabrous, or pubescent.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; hyaline; 2 -veined; acute. Fertile lemma ovate; hyaline; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 65-90 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.
    Flowers
    Lodicules 2; oblong; 0.5 mm long; fleshy; ciliate. Anthers 3; 4-4.6 mm long. Stigmas 2. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; 5-5.3 mm long; obtuse.
    Distribution
    Australasia: Australia.
    Reference
    Andropogoneae. Lazarides 1993.

    Distribution

    Native to:

    Western Australia

    Sorghum amplum Lazarides appears in other Kew resources:

    First published in Austral. Syst. Bot. 4: 606 (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

    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