Compt. Rend. Hebd. Séances Acad. Sci. 159: 561 (1914).- Type: Chevalier 34616 bis, s.l. (BR).
Regional litterature: FWTA: 78 (1972) ; Fl. Mauritania: 430 (1991); Poac. CI: 78, fig. (1995); Pl. Mauritania: 270 (1998); Fl. Guinea Bissau: 139 (2008); Poac. Niger: 106 (1999); Fl. Guinée: 467 (2009) ; Fl. Chad (2013); Pl. Sudan & S Sudan: 138 (2015).
Oryza guineensis A. Chev., Rev. Bot. Appliq. 12: 1022 (1932), invalid.;
Oryza brachyantha var. guineensis A. Chev., Rev. Bot. Appliq. 12: 1022 (1932).
Description:
* Erect weak annual, sometimes perennial of 0.3-0.4(-1) m high, with a few culms geniculately ascending or prostrate and aerial roots at the lower nodes. Leaves linear, 10-20 cm long and 4-5 mm large, green often tinged with purple; sheaths shorter than internodes, auricled; ligule 2 mm wide, hyaline
* Inflorescence a narrow erect panicle of 15-20 cm long and 0.5-2 cm wide with a main axe and pedicels 2-5 mm long.; spikelets pedicels, pedicels robust, 1.5-2.5 mm long.
* Spikelets broadly linear, 6-8 mm long and 1.0- 1.2 mm broad, light yellow with green main nerves, smooth but on the nerves and towards the tip with glassy hairs. Glumes reduced to a short rim which is entire or inconspicuously 2-lobed. Sterile lemmas subulate; upper lemma chartaceous, awns slender, stiff and straight, 6-18 cm long, with line of short glassy hairs; palea about as long as the lemma, very narrow, similar to the lemma in consistency with a short point.
Distribution West Africa: Mauritania, Senegal, Guinea Bissau, Guinea, Sierra Leone, Liberia, Mali, Ivory Coast, Niger, Chad, CAR, South Sudan.
Distribution world-wide: C Africa and Zambia.