Family:
Poaceae Barnhart
Genus:
Oryza L.

Oryza australiensis Domin

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

[GB]
Morphology General Habit
Perennial; caespitose. Rhizomes elongated; scaly. Butt sheaths papery; pallid. Culms erect; 100-180(-220) cm long; 4-8 mm diam. Culm-nodes constricted; pallid, or brown. Leaf-sheaths narrower than blade at the collar; keeled; smooth; glabrous on surface; outer margin glabrous. Leaf-sheath auricles absent (sometimes subauriculate). Ligule an eciliate membrane; 2-3 mm long; entire (often split); truncate, or obtuse. Leaf-blades 10-30 cm long; 3-10 mm wide. Leaf-blade surface scaberulous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle smooth. Panicle open; lanceolate, or elliptic; 20-45 cm long. Primary panicle branches ascending. Panicle branches angular; scabrous; hispid. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; angular; scabrous; ciliate (short and stiff); tip cupuliform; bibracteate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; rostrate; 6-7 mm long; falling entire. Spikelet callus glabrous; base truncate.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; rostrate; 6-7 mm long; falling entire. Spikelet callus glabrous; base truncate.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes both absent or obscure.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets similar; barren; without significant palea. Lemma of lower sterile floret lanceolate; 1.4-1.6 mm long; 0.2 length of spikelet; herbaceous; 1-keeled (slightly); 1 -veined; without lateral veins; acute. Lemma of upper sterile floret lanceolate; 1.4-1.6 mm long; 1 length of lower sterile floret; herbaceous. Fertile lemma oblong; laterally compressed; 6 mm long; coriaceous; keeled; 5 -veined. Lemma midvein hispid (short). Lemma surface scabrous; hispidulous. Lemma margins involute; ciliolate. Lemma apex caudate; awned; 1 -awned. Principal lemma awn flat below; 5-30 mm long overall. Palea oblong; 1 length of lemma; coriaceous; thinner on margins; 3 -veined; without keels. Palea surface scabrous; pubescent. Palea apex acuminate.
Morphology Reproductive morphology Flowers
Lodicules 2; lanceolate; membranous. Anthers 6. Stigmas 2.
Morphology Reproductive morphology Fruits
Disseminule comprising a floret.
Distribution
Australasia: Australia.
Reference
Oryzeae. TB.

Native to:

Northern Territory, Queensland, Western Australia

Oryza australiensis Domin appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Dec 4, 1984 Mueller, F.J.H. von [s.n.], Australia K000848938 isotype Yes
Dec 4, 1984 Mueller, F.J.H. von [s.n.], Australia K000848937 Yes

First published in Biblioth. Bot. 20(85): 333 (1915)

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.
  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.

Literature

Kew Backbone Distributions

  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.

  • 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 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