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This species is accepted, and its native range is Tropical Africa to Botswana.
A specimen from Kew's Herbarium

[FWTA]

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

Ecology
Growing in water, often as a weed in rice fields.

[FZ]

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

Morphology General Habit
An annual aquatic grass growing in tufts.
Morphology Culms
Culms 60-120 (rarely more) cm. tall, 3-8-noded, rather weak, erect or geniculately ascending, producing aerial roots from the lower nodes, terete, spongy, striate, smooth, glabrous.
Morphology Leaves Leaf sheaths
Leaf-sheaths scarious, striate, somewhat tight when young later loose and usually wrinkled, smooth, glabrous, produced into short auricles at the mouth.
Morphology Leaves Ligules
Ligule 3-6 (rarely -9) mm. long, thinly membraneous, truncate, or rounded.
Morphology Leaves Leaf lamina
Leaf-laminae 15-45 x 0·4-1·3 cm., linear to very narrowly elliptic (always broadest around the middle), apex acute, intense green, flaccid, glabrous, smooth on the lower, asperulous on the upper surface; midrib not very distinct, pale.
Morphology Reproductive morphology Inflorescences
Panicle 20-35 x 3-7·5 cm., obdeltoid, rather dense, many-flowered, erect or more rarely somewhat nodding; rhachis stout, angular, sulcate, glabrous, smooth; branches usually erect or obliquely ascending, often appressed to the rhachis, angular, scaberulous.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 1-6 mm. long, stout, striate, scaberulous or smooth, glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reduced to a tiny 2-lobed rim, remaining at the pedicel.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 8-10·5 mm. long (excl. the awn), up to 3·4 mm. wide, deciduous, obliquely inserted on the pedicel, oblong to oblong-semi-elliptic in lateral view, pale green to straw coloured.
Sterile
Sterile lemmas 2·5-4·5 mm. long, equal in length or nearly so, similar in shape, lanceolate or narrowly triangular in lateral view, acute, chartaceous-coriaceous, smooth or dorsally asperulous.
Morphology Reproductive morphology Inflorescences Bracts Lemma
Fertile lemma slightly shorter than the spikelet, cymbiform, coriaceous, with 2 longitudinal lateral grooves; flanks stiffly hispid to glabrous, inconspicuously tessellate; keels rounded, usually stiffly ciliate mainly towards the apex; apical callus usually dark purplish; awn (6·5)8-16(-19) cm. long, stiff, salmon-pink to purplish when fresh, terete or obtusely angular, densely covered with short forwardly directed bristles. Sterile lemmas 2·5-4·5 mm. long, equal in length or nearly so, similar in shape, lanceolate or narrowly triangular in lateral view, acute, chartaceous-coriaceous, smooth or dorsally asperulous.
Fertile
Fertile lemma slightly shorter than the spikelet, cymbiform, coriaceous, with 2 longitudinal lateral grooves; flanks stiffly hispid to glabrous, inconspicuously tessellate; keels rounded, usually stiffly ciliate mainly towards the apex; apical callus usually dark purplish; awn (6·5)8-16(-19) cm. long, stiff, salmon-pink to purplish when fresh, terete or obtusely angular, densely covered with short forwardly directed bristles.
Morphology Reproductive morphology Inflorescences Bracts Palea
Palea about as long as the lemma but much narrower, similar in texture and indument, with the apex drawn out in short blunt purplish point.

[GB]
Morphology General Habit
Annual; caespitose. Culms geniculately ascending, or decumbent; 60-120 cm long; spongy; 3-8 -noded; rooting from lower nodes. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath auricles erect. Ligule an eciliate membrane; 2-6 mm long; truncate, or obtuse. Leaf-blades 15-45 cm long; 4-13 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; obovate; 20-35 cm long; 3-7.5 cm wide. Primary panicle branches appressed, or ascending. Panicle branches angular; scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; angular; 1-6 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; 7-11 mm long; 2.5-3.4 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; 7-11 mm long; 2.5-3.4 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; 2.5-4.5 mm long; 0.3-0.4 length of spikelet; membranous; 1 -veined; without lateral veins; smooth, or scaberulous; acute. Lemma of upper sterile floret lanceolate; 2.5-4.5 mm long; 1 length of lower sterile floret; membranous. Fertile lemma elliptic; laterally compressed; 7-11 mm long; coriaceous; keeled; 5 -veined. Lemma midvein ciliate; hairy above. Lemma surface reticulate; glabrous, or hispid. Lemma margins involute. Lemma apex rostrate; awned; 1 -awned. Principal lemma awn (65-)80-160(-190) mm long overall (pink); limb scabrous. Palea elliptic; 1 length of lemma; coriaceous; 3 -veined; 1-keeled. Palea keels scabrous. Palea apex acute.
Morphology Reproductive morphology Flowers
Lodicules 2; lanceolate; membranous. Anthers 6. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Disseminule comprising a floret.
Distribution
Africa: west tropical, west-central tropical, northeast tropical, east tropical, southern tropical, and south.
Reference
Oryzeae. FZ.

[FTEA]

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

Morphology General Habit
Annual; culms up to 1.5 m. high, erect or decumbent at the base and rooting at the lower nodes.
Morphology Leaves
Leaf-blades up to 45 cm. long and 1.5 cm. broad; ligule 2–6 mm. long, glabrous, truncate.
Morphology Reproductive morphology Inflorescences
Panicle 20–30 cm. long, rather dense, the branches erect.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets oblong to narrowly oblong, 7–11 mm. long, hispid, deciduous, obliquely articulated with the pedicel; sterile lemmas lanceolate, 2.5–4 mm. long; awns 4–16 cm. long, pink or red, hispidulous, stiff.
Figures
Fig. 10/4, p. 29.
Habitat
In shallow water, and as a weed in rice fields; 1500 m.
Distribution
W. Africa from Mauritania to the Sudan Republic, T5 T7

Native to:

Angola, Benin, Botswana, Burkina, Cameroon, Central African Repu, Chad, Congo, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Zambia, Zimbabwe

Oryza barthii A.Chev. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Chevalier, A. [9615], Chad K000345480
Chevalier, A. [24981], Mali K000345487 Unknown type material
Chevalier, A. [642], Sudan K000345488
Chevalier, A. [2208], Sudan K000345491
Chevalier, A. [2207], Sudan K000345489
Aké Assi, L. [6428], Burkina Faso K000212172
Chevalier, A. [2206], Sudan K000345490

First published in Bull. Mus. Natl. Hist. Nat. 16: 405 (1910)

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.
  • Barry, J. P. & Celles, J.S. (1991). Flore de Mauritanie 2: 360-550. Centre Regional de Documentation Pedagogique, Nice.
  • 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.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(2): 1-94. ORSTOM, Bangui.
  • 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.
  • Lisowski, S. (2009). Flore (Angiospermes) de la République de Guinée Scripta Botanica Belgica 41: 1-517.
  • 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.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Troupin, G. (ed.) (1988). Flora du Rwanda 4: I-X, 1-651. Musee Royal de l'Afrique Centrale.

Literature

Flora of West Tropical Africa

  • in Bull. Mus. Hist. Nat. Paris 16: 405 (1911)
  • not of F.W.T.A. ed. 1, 2: 537.

Kew Backbone Distributions

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • 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.
  • 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.
  • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.

Flora of Tropical East Africa

  • A. Chev. in Bull. Mus. Hist. Nat. Paris 16: 405 (1911).

Flora Zambesiaca
Flora Zambesiaca
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Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of West Tropical Africa
Flora of West Tropical Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

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