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This species is accepted, and its native range is New Guinea to N. & E. Australia.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Rhizomes elongated. Culms geniculately ascending; 180-360 cm long; 6-12 mm diam.; rooting from lower nodes. Culm-internodes smooth; distally glabrous. Culm-nodes glabrous. Lateral branches lacking, or sparse; arising from lower culm. Leaf-sheaths loose; longer than adjacent culm internode; smooth, or scaberulous; glabrous on surface, or puberulous. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 5 mm long. Leaf-blades 30-50 cm long; 10-30 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 15-18 secondary veins. Leaf-blade surface scabrous; glabrous. Leaf-blade margins cartilaginous; scabrous, or spinulose. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes numerous; borne along a central axis; erect; unilateral; 7-15 cm long; with branchlets at base of longer racemes. Central inflorescence axis 20-50 cm long; glabrous, or puberulous. Rhachis angular; 1 mm wide; scabrous on margins. Spikelet packing contiguous; 2-4 -rowed. Raceme-bases glabrous, or hirsute. Spikelets in pairs. Fertile spikelets pedicelled; subequal. Pedicels unequal; 1-2 mm long; scabrous; tip discoid.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or ovate; dorsally compressed; cuspidate; 3.5-4 mm long; falling entire. Rhachilla internodes elongated between glumes.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or ovate; dorsally compressed; cuspidate; 3.5-4 mm long; falling entire. Rhachilla internodes elongated between glumes.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.33-0.5 length of spikelet; without keels; 3-5 -veined. Lower glume surface spinose; rough on veins; glabrous, or puberulous. Lower glume margins eciliate, or ciliolate. Lower glume apex acute, or acuminate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5-9 -veined. Upper glume surface spinose; rough on veins; glabrous, or puberulous. Upper glume apex acuminate, or caudate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 7 -veined; flat across back, or concave across back; scabrous; rough on veins; cuspidate; muticous, or awned. Awn of lower sterile floret 5-15 mm long. Palea of lower sterile floret 1 length of lemma; smooth, or scabrous; adorned on keels. Fertile lemma elliptic; gibbous; 3.5 mm long; indurate; much thinner above; yellow; shiny; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface smooth. Lemma margins involute. Lemma apex cuspidate; scabrous. Palea reflexed at apex; 1 length of lemma; indurate.
Morphology Reproductive morphology Flowers
Anthers 3; 2-2.6 mm long; orange, or purple.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid, or oblong; 2-2.5 mm long. Embryo 0.66 length of caryopsis.
Distribution
Asia-tropical: Papuasia. Australasia: Australia.
Reference
Paniceae. Michael 1997.

Native to:

New Guinea, Northern Territory, Queensland

Echinochloa praestans P.W.Michael appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Darbyshire, P.J. [815], Papua New Guinea K000958848

First published in Telopea 2: 31 (1980)

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

Herbarium Catalogue Specimens
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 2021. 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 2021. 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