Genus:
Oryza L.

Oryza longistaminata A.Chev. & Roehr.

This species is accepted, and its native range is Tropical & S. Africa, Madagascar.

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Perennial with extensive creeping rhizomes; stems up to 120 cm high, soft and spongy, up to 1 cm in diam. at the base, often decumbent and rooting from the lower nodes
Morphology Leaves
Leaves up to 45 x 1.5 cm; ligule 15–45 mm long, acute
Morphology Reproductive morphology Inflorescences
Panicle 20–30 cm long
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly oblong, 7–9 mm long, scabrid to hispid, deciduous, obliquely articulated with the pedicel; sterile lemmas lanceolate, 2–3 mm long; awn 4–8 cm long, rigid.
Distribution
S3 tropical Africa to Namibia and South Africa and Madagascar

[GB]
Morphology General Habit
Perennial. Rhizomes elongated. Culms geniculately ascending, or decumbent; 70-120 cm long; 5-10 mm diam.; spongy; (2-)4-10 -noded; rooting from lower nodes. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath auricles erect; 10-15 mm long. Ligule an eciliate membrane; 15-45 mm long; entire, or lacerate; acute. Leaf-blades 10-75 cm long; 5-25 mm wide. Leaf-blade midrib indistinct, or evident. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic, or oblong; 16-40 cm long; 1.5-8 cm wide. Primary panicle branches appressed, or ascending. Panicle branches angular; scaberulous; glabrous in axils, or pubescent in axils. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; angular; 0.5-4(-7) mm long; smooth, or scaberulous; tip cupuliform; bibracteate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 7-12 mm long; 2-3 mm wide; falling entire. Spikelet callus glabrous; base truncate; attached obliquely.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 7-12 mm long; 2-3 mm wide; falling entire. Spikelet callus glabrous; base truncate; attached obliquely.
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; (2-)2.5-3.8(-4.5) mm long; 0.3-0.4 length of spikelet; membranous; 1 -veined; without lateral veins; acute, or acuminate. Lemma of upper sterile floret lanceolate; (2-)2.5-3.8(-4.5) mm long; 1 length of lower sterile floret; membranous. Fertile lemma elliptic; laterally compressed; 7-12 mm long; coriaceous; keeled; 5 -veined. Lemma midvein spinulose. Lemma surface reticulate; hispid. Lemma margins involute. Lemma apex rostrate; awned; 1 -awned. Principal lemma awn (26-)40-75 mm long overall; limb scabrous. Palea elliptic; 0.9 length of lemma; coriaceous; 3 -veined; 1-keeled. Palea keels scabrous. Palea apex acute.
Morphology Reproductive morphology Flowers
Lodicules 2; lanceolate; membranous. Anthers 6; 4.5-5.5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 7.5-8.5 mm long. Disseminule comprising a floret.
Distribution
Africa: west tropical, west-central tropical, northeast tropical, east tropical, southern tropical, south, and western Indian ocean.
Reference
Oryzeae. FZ.

[FWTA]

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Ecology
Swamps, riversides and as a weed in rice fields.

[FZ]

Gramineae, E. Launert. Flora Zambesiaca 10:1. 1971

Morphology General Habit
A robust perennial with long creeping branched rhizomes.
Morphology Culms
Culms up to 250 cm. tall or more, up to 2·5 cm. or more in diam., (2)4-10-noded, erect or ascending, sometimes floating, weak, spongy, the submerged parts whitish, developing aerial roots from the nodes, glabrous, smooth.
Morphology Leaves Leaf sheaths
Leaf-sheaths scarious, spongy, usually tessellate, pale-green to brownish, shorter or nearly as long as the internodes, with up to 15 mm. long narrow auricles at the mouth, glabrous, smooth.
Morphology Leaves Ligules
Ligule (0·8)1·5-5·5 cm. long, narrowly triangular, acute.
Morphology Leaves Leaf lamina
Leaf-laminae 10-75 x 0·5-2·5 cm., linear, linear-lanceolate to very narrowly elliptic, broadest below the middle, acuminate, bright to dark green, somewhat flaccid, asperulous on the upper, smooth or somewhat asperulous on the lower surface, usually scabrous along the margins, glabrous, midrib often indistinct.
Morphology Reproductive morphology Inflorescences
Panicle 16-40 x 2·5-8 cm., narrowly oblong to narrowly elliptic in outline, erect or slightly drooping, dense, many-flowered; rhachis obtusely angular, usually smooth, glabrous; branches obliquely ascending to nearly erect, somewhat stiff, angular, scaberulous, glabrous but usually with a tuft of short hairs at the very base.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 0·5-4(-7) mm. long, stout, angular, scabrous or smooth.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 7-12(-15) mm. long (excl. awn) and 2-3 mm. wide, deciduous, obliquely attached to the pedicel, asymmetrically elliptic-oblong in lateral view, pale-green to brownish.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reduced to a narrow membranous rim.
Morphology Reproductive morphology Inflorescences Bracts Lemma
Sterile lemmas nearly equal in shape and size, (2)2·5-3·8(-4·5) mm. long, lanceolate to broadly lanceolate, acute to acuminate, sometimes 3-dentate with the central tooth dominating the lateral (see fig. D.1), glabrous, smooth. Fertile lemma slightly shorter than the spikelet, cymbiform, semi-elliptic-oblong, coriaceous; flanks finely tessellate, stiffly hispid to a varying degree; keels usually stiffly ciliate towards the apex; lateral apical protrusions mostly distinct; awn (2·6)4-7·5 cm. long, rather slender, straight or slightly wavy, usually pink when fresh (at least in the upper part) or often purplish, scabrous with short stiff forward directed bristles.
Sterile
Sterile lemmas nearly equal in shape and size, (2)2·5-3·8(-4·5) mm. long, lanceolate to broadly lanceolate, acute to acuminate, sometimes 3-dentate with the central tooth dominating the lateral (see fig. D.1), glabrous, smooth.
Fertile
Fertile lemma slightly shorter than the spikelet, cymbiform, semi-elliptic-oblong, coriaceous; flanks finely tessellate, stiffly hispid to a varying degree; keels usually stiffly ciliate towards the apex; lateral apical protrusions mostly distinct; awn (2·6)4-7·5 cm. long, rather slender, straight or slightly wavy, usually pink when fresh (at least in the upper part) or often purplish, scabrous with short stiff forward directed bristles.
Morphology Reproductive morphology Inflorescences Bracts Palea
Palea slightly shorter than the lemma and much narrower but of the same consistency and indument; apex acute or tapering into a subacute point, somewhat outwardly curved.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 6; anthers 4·5-5·5 mm. long, linear-oblong.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas blackish.
Morphology Reproductive morphology Fruits
Caryopsis 7·5-8·5 mm. long, oblong in lateral view, glabrous, light-brown, glossy.

[FTEA]

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Perennial with extensive creeping underground rhizomes.
Morphology Culms
Culms ± 120 cm. high, soft and spongy, up to 1 cm. in diameter at the base, often decumbent and rooting at the lower nodes.
Morphology Leaves
Leaf-blades up to 45 cm. long and 1.5 cm. broad; ligule 15–45 mm. long, glabrous, acute, often split down the middle.
Morphology Reproductive morphology Inflorescences
Panicle typically 20–30 cm. long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly oblong, 7–9 mm. long, scabrid to hispid, deciduous, obliquely articulated with the pedicel; sterile lemmas lanceolate, 2–3 mm. long; awn 4–8 cm. long, rigid.
Figures
Fig. 10/5, 6, 8, p. 29.
Habitat
Swamp and flood plain grassland, growing in shallow water; sea-level to 1400 m.
Distribution
K7 T3 T4 T5 T6 T7 T8 U1 U3 U4 throughout tropical Africa, extending to South West Africa and South Africa (Transvaal)

Native to:

Angola, Benin, Botswana, Burkina, Burundi, Cameroon, Chad, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Namibia, Niger, Nigeria, Northern Provinces, Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

English
Wild rice

Oryza longistaminata A.Chev. & Roehr. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Aug 1, 1966 Vanderyst, H. [3642], Congo, DRC K000345481 Yes
Aug 1, 1966 Davies, R.M. [1045], Zimbabwe K000384334 Yes
Aug 1, 1966 Goldsmith, B. [21], Zimbabwe K000384339 Yes
Aug 1, 1966 Hornby, R.E. [2442], Zimbabwe K000384333 Yes
Aug 1, 1966 Hornby, R.E. [2442], Zimbabwe K000384332 Yes
Vanderyst, H. [3992], Congo, DRC K000345482 Yes
Vanderyst, H. [4265], Congo, DRC K000345483 Yes
Winter, B. de [4911], Namibia K000385727 Yes
Killick, D.J.B. [3029], Botswana K000385729 Yes
Winter, B. de [107], South Africa K000385732 Yes
Cleghorn, W.B. [1544], Zimbabwe K000384340 Yes
Schweicherdt, H.G. [1607], South Africa K000385768 Yes
Schweickerdt, H.G.W.J. [1799], South Africa K000385731 Yes
Smook, L. [1947], South Africa K000385738 Yes
Winter, B. de [107], South Africa K000385739 Yes
Schweicherdt, H.G. [1796], South Africa K000385730 Yes
Simon, B.K. [2137], Zimbabwe K000384335 Yes
Coetzer, L.A. [31], South Africa K000385735 Yes
Ellis, R.P. [2786], Zimbabwe K000384337 Yes
Winter, B. de [745], South Africa K000385733 Yes
Chiparawasha, O. [427], Zimbabwe K000384338 Yes
Du Toit, P.C.V. [509], South Africa K000385737 Yes
Smook, L. [1942], South Africa K000385736 Yes
Winter, B. de [4780], Namibia K000385726 Yes
Simon, B.K. [2137], Zimbabwe K000384336 Yes
Schweicherdt, H.G. [1867], South Africa K000385734 Yes
Schoenfelder, E.B. [1017], South Africa K000385725 Yes
Barnard, I.J. [32303], Namibia K000385724 Yes

First published in Compt. Rend. Hebd. Séances Acad. Sci. 159: 561 (1914)

Accepted by

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Bosser, J. (1969). Gramiées des pasturages et des cultures a Madagascar: 1-440. ORSTOM, Paris.
  • Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
  • Brunel, J.F., Hiepo, P. & Scholz, H. (eds.) (1984). Flore Analytique du Togo Phanérogames: 1-751. GTZ, Eschborn.
  • Catarino, L., Sampaio Martins, E., Pinto-Basto, M.F. & Diniz, M.A. (2006). Plantas Vasculares e Briófitos da Guiné-Bissau: 1-298. Instituto de investigação científica tropical, Instituto Português de apoio ao desenvolvimento.
  • Clayton, W.D. (1970). Gramineae. Flora of Tropical East Africa 1: 1-176.
  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola. Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
  • Launert, E. (1971). Flora Zambesiaca 10(1): 1-152. Royal Botanic Gardens, Kew.
  • Lebrun, J.-P., Audru, J., Gaston, A. & Mosnier, M. (1972). Catalogue des Plantes Vasculaires du Tchad Méridional: 1-289. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Lebrun, J.P. (1973). Énumération des plantes vasculaires du Sénégal: 1-209. Maisons Alfort: Institut d'élevage et de médecine vétérinaire des pays tropicaux.
  • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi. Lejeunia; Revue de Botanique, n.s., 132: 1-127.
  • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
  • Peyre de Fabregues, B. & Lebrun, J.-P. (1976). Catalogue des Plantes Vascularies du Niger: 1-433. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Sosef, M.S.M. & al. (2019). Novitates Gabonenses 91: additons to the grass flora of Gabon. Plant Ecology and Evolution 152: 99-105.
  • Thulin, M. (ed.) (1995). Flora of Somalia 4: i-ii, 1-298. The Royal Botanic Gardens, Kew.

Literature

Flora of West Tropical Africa

  • Chev. Bot. 739.
  • in Compt. Rend. Acad. Sci. 159: 561 (1914)

Kew Backbone Distributions

  • Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
  • Brunel, J.F., Hiepo, P. & Scholz, H. (eds.) (1984). Flore Analytique du Togo Phanérogames: 1-751. GTZ, Eschborn.
  • Catarino, L., Sampaio Martins, E., Pinto-Basto, M.F. & Diniz, M.A. (2006). Plantas Vasculares e Briófitos da Guiné-Bissau: 1-298. Instituto de investigação científica tropical, Instituto Português de apoio ao desenvolvimento.
  • Clayton, W.D. (1970). Gramineae. Flora of Tropical East Africa 1: 1-176.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola. Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
  • Launert, E. (1971). Flora Zambesiaca 10(1): 1-152. Royal Botanic Gardens, Kew.
  • Lebrun, J.-P., Audru, J., Gaston, A. & Mosnier, M. (1972). Catalogue des Plantes Vasculaires du Tchad Méridional: 1-289. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi. Lejeunia; Revue de Botanique, n.s., 132: 1-127.
  • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
  • Thulin, M. (ed.) (1995). Flora of Somalia 4: i-ii, 1-298. The Royal Botanic Gardens, Kew.

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by T. A. Cope [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • A. Chev. & Roehr. in Compt. Rend. Acad. Sci. 159: 561 (1914).

  • Flora Zambesiaca

    Flora Zambesiaca
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  • Flora of Tropical East Africa

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  • Flora of West Tropical Africa

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  • GrassBase - The Online World Grass Flora

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  • Herbarium Catalogue Specimens

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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/
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