1. Family: Poaceae Barnhart
    1. Genus: Sorghum Moench
      1. Sorghum macrospermum E.D.Garber

        This species is accepted, and its native range is N. & NW. Northern Territory.

    [GB]
    Habit
    Annual. Culms erect; robust; 180-380 cm long; 5-10 mm diam.; without nodal roots, or with prop roots. Culm-nodes glabrous, or pubescent. Leaves cauline. Ligule a ciliolate membrane; 2.6-5 mm long. Leaf-blade base broadly rounded. Leaf-blades 30-60 cm long; 15-30 mm wide. Leaf-blade surface glabrous, or pilose; hairy adaxially; with tubercle-based hairs. Leaf-blade margins smooth, or spinulose. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle with branches tipped by a raceme. Panicle open; ovate; effuse; 15-35 cm long. Primary panicle branches drooping, or reflexed; distant; 1-4 -nate; not whorled; simple, or moderately divided; 4-8 cm long. Panicle branches glabrous in axils, or pubescent in axils. Racemes 4-12 cm long; bearing 9-21 fertile spikelets on each. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes linear; 4-6 mm long. Rhachis internode tip transverse; cupuliform. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; 5-6 mm long; ciliate.
    Sterile
    Basal sterile spikelets absent, or well-developed; 0-4 in number. Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; linear; 6.5-13.5 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 7-17 -veined; glabrous, or pubescent; muticous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 10-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus 0.2 mm long; bearded; base truncate, or obtuse. Spikelet callus hairs 0.1-0.25 length of spikelet. Basal sterile spikelets absent, or well-developed; 0-4 in number. Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; linear; 6.5-13.5 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 7-17 -veined; glabrous, or pubescent; muticous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 10-11 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus 0.2 mm long; bearded; base truncate, or obtuse. Spikelet callus hairs 0.1-0.25 length of spikelet.
    Glume
    Glumes dissimilar; with lower wider than upper; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume ovate; 1 length of spikelet; coriaceous; much thinner above; without keels; keel-less except near apex; 15-20 -veined. Lower glume surface scabrous (above); glabrous. Lower glume apex dentate; 2 -fid. Upper glume ovate; coriaceous; much thinner above; without keels; winged on margins; 7 -veined. Upper glume lateral veins with cross-veins. Upper glume surface scabrous; rough above; pubescent. Upper glume margins ciliate. Upper glume apex truncate, or obtuse.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 0.8 length of spikelet; hyaline; 2 -veined; ciliolate on margins. Fertile lemma oblong; 3.5-4 mm long; hyaline; 1 -veined. Lemma margins ciliate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 33-52 mm long overall; with twisted column. Column of lemma awn pubescent; hairy on the spiral. Palea absent or minute.
    Flowers
    Lodicules 2; glabrous. Anthers 3; 5.5-6.8 mm long.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid, or ovoid; 5.2-6.3 mm long.
    Distribution
    Australasia: Australia.
    Reference
    Andropogoneae. Lazarides.

    Distribution

    Native to:

    Northern Territory

    Sorghum macrospermum E.D.Garber appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1990 Lazarides [6847], Australia K000731289
    Jan 1, 1990 Adams [889], Australia K000731290
    Apr 2, 1971 Dunlop [2155], Australia K000731287
    Blake, S.T. [17446], Australia K000731288

    First published in Univ. Calif. Publ. Bot. 23: 323 (1950)

    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.

    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