- Family:
- Poaceae Barnhart
- Genus:
- Oryza L.
Oryza ridleyi Hook.f.

[GB]
- Morphology General Habit
- Perennial. Culms geniculately ascending, or decumbent; 100-150 cm long. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 3-5 mm long. Leaf-blades 15-30 cm long; 15-25 mm wide. Leaf-blade surface smooth. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
- Morphology Reproductive morphology Inflorescences
- Inflorescence a panicle. Panicle open; elliptic; 25-35 cm long; 10-15 cm wide. Primary panicle branches ascending; simple; 6-12 cm long. Panicle branches scaberulous. Spikelets appressed. Fertile spikelets pedicelled. Pedicels linear; angular; tip cupuliform.
- Morphology Reproductive morphology Inflorescences Spikelets
- Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 8.9 mm long; 2.5 mm wide; falling entire. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.6 mm long.
- Fertile
- Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 8.9 mm long; 2.5 mm wide; falling entire. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.6 mm long.
- 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 subulate; 6-7.5 mm long; 0.8 length of spikelet; scaberulous. Lemma of upper sterile floret subulate; 6-7.5 mm long; 1 length of lower sterile floret. Fertile lemma elliptic; laterally compressed; 7-8 mm long; coriaceous; keeled; 5 -veined. Lemma midvein spinulose. Lemma surface scaberulous; rough on veins. Lemma margins interlocking with palea margins. Lemma apex awned; 1 -awned. Principal lemma awn 4-8 mm long overall. Palea elliptic; 9 mm long; coriaceous; 3 -veined; 1-keeled. Palea keels spinulose. Palea apex acuminate; with excurrent keel veins.
- Morphology Reproductive morphology Flowers
- Lodicules 2; membranous. Anthers 6. Stigmas 2.
- Morphology Reproductive morphology Fruits
- Caryopsis with adherent pericarp. Disseminule comprising a floret.
- Distribution
- Asia-tropical: Indo-China, Malesia, and Papuasia.
- Reference
- Oryzeae. Fl Ceyl.
Native to:
Borneo, Cambodia, Laos, Malaya, Myanmar, New Guinea, Sumatera, Thailand, Vietnam
Oryza ridleyi Hook.f. appears in other Kew resources:
Date | Reference | Identified As | Barcode | Type Status | Has image? |
---|---|---|---|---|---|
Dec 4, 1984 | Ridley, H.N. [1178], Peninsular Malaysia | K000290493 | holotype | Yes | |
Dec 4, 1984 | Put [3103], Thailand | K000631571 | Yes | ||
Dec 4, 1984 | Kerr, A.F.G. [19780], Thailand | K000631569 | Yes | ||
Dec 4, 1984 | Smitinand, T. [10421], Thailand | K000682190 | Yes | ||
Dec 4, 1984 | Kerr, A.F.G. [19780], Thailand | K000631568 | Yes | ||
Dec 4, 1984 | Kerr, A.F.G. [4505], Thailand | K000631567 | Yes | ||
Dec 4, 1984 | Put [3103], Thailand | K000631572 | Yes | ||
Dec 4, 1984 | Put [3103], Thailand | K000631570 | Yes | ||
Ridley [10007], Malaysia | K000290606 | Yes | |||
Katayama, T.C. [W0001], Thailand | K000682191 | Yes |
First published in Fl. Brit. India 7: 93 (1896)
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.
- Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.
- Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.
- Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar. Contributions from the United States National Herbarium 45: 1-590.
- Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya. Gardens' Bulletin Singapore 47(2): 347-655.
Literature
Kew Backbone Distributions
- Camus, E.G. & Camus, A. in H. Lecomte (1922). Flore Générale de l'indo-Chine 1(3): 193-336.
- Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.
- Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.
- Hộ, P.-H. (2000). Câycỏ Việtnam. An Illustrated flora of Vietnam, ed. 2, 3: 1-1020. Pham-hoang Ho, Montréal.
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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/
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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