Family:
Poaceae Barnhart
Genus:
Echinochloa P.Beauv.

Echinochloa inundata Michael & Vickery

This species is accepted, and its native range is Central & E. Australia.

[GB]
Morphology General Habit
Annual. Culms erect, or geniculately ascending; 60-120 cm long; 4-8 mm diam.; compressible; 5 -noded. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule absent. Leaf-blades 15-30 cm long; 6-12 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acute, or acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes numerous; borne along a central axis; erect, or ascending; unilateral; 2-6 cm long. Central inflorescence axis 7-10 cm long; with scattered hairs. Rhachis subterete; scabrous on margins. Spikelet packing crowded; 4 -rowed. Spikelets in pairs. Fertile spikelets pedicelled; subequal. Pedicels unequal.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; cuspidate; 3.5-5 mm long; 1.75-2 mm wide; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; cuspidate; 3.5-5 mm long; 1.75-2 mm wide; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.5-0.6 length of spikelet; without keels; 3-5 -veined. Lower glume surface scabrous. Lower glume apex cuspidate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface scabrous; hispidulous; with tubercle-based hairs. Upper glume apex cuspidate; muticous, or mucronate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5-7 -veined; concave across back; hispidulous; with tubercle-based hairs; cuspidate; muticous, or awned. Awn of lower sterile floret 0-12 mm long. Palea of lower sterile floret 0.75-0.85 length of lemma. Fertile lemma elliptic; 3.5-3.75 mm long; indurate; much thinner above; yellow; shiny; without keel; 5 -veined. Lemma margins involute. Lemma apex acute; laterally pinched. Palea reflexed at apex; indurate.
Morphology Reproductive morphology Flowers
Anthers 3; 1-1.3 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 1.8-2.2 mm long; light brown. Embryo 0.75 length of caryopsis.
Distribution
Australasia: Australia.
Reference
Paniceae. Vickery 1994.

Native to:

New South Wales, Queensland, South Australia

Echinochloa inundata Michael & Vickery appears in other Kew resources:

First published in Telopea 1: 46 (1975)

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.

  • 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 2022. 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 2022. 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