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This species is accepted, and its native range is S. China to Tropical Asia and N. Australia.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose. Culms geniculately ascending, or decumbent; robust; 120-150 cm long. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath auricles absent. Ligule an eciliate membrane; 3-5 mm long; erose; obtuse. Leaf-blades 25-50 cm long; 10-20 mm wide. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 6-20 fertile spikelets. Panicle open; ovate; 20-40 cm long. Primary panicle branches spreading, or drooping; 2-4 -nate; whorled at lower nodes; simple; 10-15 cm long. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; angular; 0.5 length of fertile spikelet.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; laterally compressed; 4-5 mm long; 2-2.4 mm wide; falling entire.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; laterally compressed; 4-5 mm long; 2-2.4 mm wide; falling entire.
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; 1.5 mm long; 0.3-0.4 length of spikelet; 1 -veined; without lateral veins; acuminate. Lemma of upper sterile floret lanceolate; 1.5 mm long; 1 length of lower sterile floret. Fertile lemma oblong, or orbicular; laterally compressed; 4-5 mm long; coriaceous; dark brown, or black; keeled; 5 -veined. Lemma midvein spinulose. Lemma surface scabrous and reticulate. Lemma margins interlocking with palea margins. Lemma apex awned; 1 -awned. Principal lemma awn 3-18 mm long overall. Palea elliptic; coriaceous; 3 -veined; 1-keeled. Palea keels spinulose. Palea surface scaberulous. Palea apex acute; awned; awns 1 mm long.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 6; 2.5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Disseminule comprising a spikelet.
Distribution
Asia-temperate: China. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia.
Reference
Oryzeae. Fl Ceyl.
Diagnostic
Panicle branches naked in lower half.

Native to:

Assam, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Malaya, Myanmar, Nepal, New Guinea, Northern Territory, Philippines, Queensland, Thailand, Vietnam

Oryza officinalis Wall. ex Watt appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Wallich [8633], India K000032072 Unknown type material
Clarke, C.B. [7062], India K000032073 Unknown type material
De Silva [8633], India K000032074 Unknown type material
Songkran/DAVaughan [086/88/TNE135], Thailand K000682226
Gomez, W. [Cat. no. 8635], Myanmar K001131046

First published in Dict. Econ. Prod. India 5: 501 (1891)

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.
  • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

Literature

Kew Backbone Distributions

  • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
  • Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655.
  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

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